diff --git a/TODO.md b/TODO.md
index 6b0ff87a..c3da63d0 100644
--- a/TODO.md
+++ b/TODO.md
@@ -174,7 +174,7 @@ require_once(‘/etc/moodles/’.$moodle_host.‘config.php’);``` moodle/drupl
 * allow empty metric pack for default rates? changes on rating algo
 # don't produce lines with cost == 0 or quantity 0 ? maybe minimal quantity for billing? like 0.1 ? or minimal price? per line or per bill?
 
-# lines too long on invoice, double lines or cut, and make margin wider
+# lines too long on invoice, double lines or cut
 
 * payment methods icons
 * use server.name | server.address on python backends, like gitlab instead of settings?
@@ -183,11 +183,11 @@ require_once(‘/etc/moodles/’.$moodle_host.‘config.php’);``` moodle/drupl
 * update service orders on a celery task? because it take alot
 
 # FIXME do more test, make sure billed until doesn't get uodated whhen services are billed with les metric, and don't upgrade billed_until when undoing under this circumstances
-    * line 513: change threshold and one time service metric change should update last value if not billed, only record for recurring invoicing. postpay services should store the last metric for pricing period.
-    * add ini, end dates on bill lines and breakup quanity into size(defaut:1) and metric
-    * threshold for significative metric accountancy on services.handler
-    * http://orchestra.pangea.org/admin/orders/order/6418/
-    * http://orchestra.pangea.org/admin/orders/order/6495/bill_selected_orders/
+#    * line 513: change threshold and one time service metric change should update last value if not billed, only record for recurring invoicing. postpay services should store the last metric for pricing period.
+#    * add ini, end dates on bill lines and breakup quanity into size(defaut:1) and metric
+#    * threshold for significative metric accountancy on services.handler
+#    * http://orchestra.pangea.org/admin/orders/order/6418/
+#    * http://orchestra.pangea.org/admin/orders/order/6495/bill_selected_orders/
 
 * move normurlpath to orchestra.utils from websites.utils
 
@@ -254,8 +254,6 @@ https://code.djangoproject.com/ticket/24576
 * move all tests to django-orchestra/tests
 * *natural keys: those fields that uniquely identify a service, list.name, website.name, webapp.name+account, make sure rest api can not edit thos things
 
-# migrations accounts, bill, orders, auth -> migrate the rest (contacts lambda error)
-
 
 * MultiCHoiceField proper serialization
 
@@ -275,19 +273,14 @@ https://code.djangoproject.com/ticket/24576
 # bill.totals make it 100% computed?
 * joomla: wget https://github.com/joomla/joomla-cms/releases/download/3.4.1/Joomla_3.4.1-Stable-Full_Package.tar.gz -O - | tar xvfz -
 
-
-# bill confirmation: show total
 # Amend lines???
 # orders currency setting
 
 # Determine the difference between data serializer used for validation and used for the rest API!
 # Make PluginApiView that fills metadata and other stuff like modeladmin plugin support
 
-# custom validation for settings
 # TODO orchestra related services code reload: celery/uwsgi reloading find aonther way without root and implement reload
-# insert settings on dashboard dynamically
 
-# convert all complex settings to string
 # size monitor of @002 @003 database names
 # password validation cracklib on change password form=?????
 # reset setting button 
@@ -353,18 +346,20 @@ make django admin taskstate uncollapse fucking traceback, ( if exists ?)
 
 resorce monitoring more efficient, less mem an better queries for calc current data
 
-# test best_price rating method
-
 # bill this https://orchestra.pangea.org/admin/orders/order/8236/ should be already billed, <= vs <
 # Convert rating method from function to PluginClass
 # Tests can not run because django.db.utils.ProgrammingError: relation "accounts_account" does not exist
 
 # autoresponses on mailboxes, not addresses or remove them
 
-# Async specific backend actions? systemusers.set_permission
-
-
+# ACL don't give exec permissions to files!
+# force save and continue on routes (and others?)
 # gevent for python3
 apt-get install cython3
 export CYTHON='cython3'
 pip3 install https://github.com/fantix/gevent/archive/master.zip
+
+
+# SIgnal handler for notify workers to reload stuff, like resource sync: https://docs.python.org/2/library/signal.html
+
+# INVOICE fucking Id based on order ID or what?
diff --git a/orchestra/admin/options.py b/orchestra/admin/options.py
index fb0b9a3c..3396b97e 100644
--- a/orchestra/admin/options.py
+++ b/orchestra/admin/options.py
@@ -113,6 +113,7 @@ class ChangeAddFieldsMixin(object):
     add_form = None
     add_prepopulated_fields = {}
     change_readonly_fields = ()
+    change_form = None
     add_inlines = None
     
     def get_prepopulated_fields(self, request, obj=None):
@@ -151,8 +152,12 @@ class ChangeAddFieldsMixin(object):
     def get_form(self, request, obj=None, **kwargs):
         """ Use special form during user creation """
         defaults = {}
-        if obj is None and self.add_form:
-            defaults['form'] = self.add_form
+        if obj is None:
+            if self.add_form:
+                defaults['form'] = self.add_form
+        else:
+            if self.change_form:
+                defaults['form'] = self.change_form
         defaults.update(kwargs)
         return super(ChangeAddFieldsMixin, self).get_form(request, obj, **defaults)
 
diff --git a/orchestra/contrib/mailboxes/models.py b/orchestra/contrib/mailboxes/models.py
index 41617c00..ac0e2704 100644
--- a/orchestra/contrib/mailboxes/models.py
+++ b/orchestra/contrib/mailboxes/models.py
@@ -22,7 +22,7 @@ class Mailbox(models.Model):
         related_name='mailboxes')
     filtering = models.CharField(max_length=16,
         default=settings.MAILBOXES_MAILBOX_DEFAULT_FILTERING,
-        choices=[(k, v[0]) for k,v in settings.MAILBOXES_MAILBOX_FILTERINGS.items()])
+        choices=[(k, v[0]) for k,v in sorted(settings.MAILBOXES_MAILBOX_FILTERINGS.items())])
     custom_filtering = models.TextField(_("filtering"), blank=True,
         validators=[validators.validate_sieve],
         help_text=_("Arbitrary email filtering in sieve language. "
diff --git a/orchestra/contrib/mailboxes/settings.py b/orchestra/contrib/mailboxes/settings.py
index 3cbc3f39..790678e0 100644
--- a/orchestra/contrib/mailboxes/settings.py
+++ b/orchestra/contrib/mailboxes/settings.py
@@ -82,18 +82,30 @@ MAILBOXES_MAILBOX_FILTERINGS = Setting('MAILBOXES_MAILBOX_FILTERINGS',
     {
         # value: (verbose_name, filter)
         'DISABLE': (_("Disable"), ''),
-        'REJECT': (mark_safe_lazy(_("Reject spam (Score&ge;9)")), textwrap.dedent("""
+        'REJECT': (mark_safe_lazy(_("Reject spam (Score&ge;9)")), textwrap.dedent("""\
              require ["fileinto","regex","envelope","vacation","reject","relational","comparator-i;ascii-numeric"];
              if header :value "ge" :comparator "i;ascii-numeric" "X-Spam-Score" "9" {
                 discard;
                 stop;
             }""")),
-        'REDIRECT': (mark_safe_lazy(_("Archive spam (Score&ge;9)")), textwrap.dedent("""
+        'REJECT5': (mark_safe_lazy(_("Reject spam (Score&ge;5)")), textwrap.dedent("""\
+             require ["fileinto","regex","envelope","vacation","reject","relational","comparator-i;ascii-numeric"];
+             if header :value "ge" :comparator "i;ascii-numeric" "X-Spam-Score" "5" {
+                discard;
+                stop;
+            }""")),
+        'REDIRECT': (mark_safe_lazy(_("Archive spam (Score&ge;9)")), textwrap.dedent("""\
             require ["fileinto","regex","envelope","vacation","reject","relational","comparator-i;ascii-numeric"];
             if header :value "ge" :comparator "i;ascii-numeric" "X-Spam-Score" "9" {
                 fileinto "Spam";
                 stop;
             }""")),
+        'REDIRECT5': (mark_safe_lazy(_("Archive spam (Score&ge;5)")), textwrap.dedent("""\
+            require ["fileinto","regex","envelope","vacation","reject","relational","comparator-i;ascii-numeric"];
+            if header :value "ge" :comparator "i;ascii-numeric" "X-Spam-Score" "5" {
+                fileinto "Spam";
+                stop;
+            }""")),
         'CUSTOM': (_("Custom filtering"), lambda mailbox: mailbox.custom_filtering),
     }
 )
diff --git a/orchestra/contrib/orchestration/admin.py b/orchestra/contrib/orchestration/admin.py
index dc655d8b..cac1404d 100644
--- a/orchestra/contrib/orchestration/admin.py
+++ b/orchestra/contrib/orchestration/admin.py
@@ -3,6 +3,7 @@ from django.utils.html import escape
 from django.utils.safestring import mark_safe
 from django.utils.translation import ugettext_lazy as _
 
+from orchestra.admin import ExtendedModelAdmin
 from orchestra.admin.utils import admin_link, admin_date, admin_colored, display_mono
 
 from . import settings, helpers
@@ -23,13 +24,28 @@ STATE_COLORS = {
 }
 
 
-class RouteAdmin(admin.ModelAdmin):
+from django import forms
+from orchestra.forms.widgets import SpanWidget
+from orchestra.forms.widgets import paddingCheckboxSelectMultiple
+class RouteForm(forms.ModelForm):
+    def __init__(self, *args, **kwargs):
+        super(RouteForm, self).__init__(*args, **kwargs)
+        if self.instance:
+            self.fields['backend'].widget = SpanWidget()
+            self.fields['backend'].required = False
+            self.fields['async_actions'].widget = paddingCheckboxSelectMultiple(45)
+            self.fields['async_actions'].choices = ((action, action) for action in self.instance.backend_class.actions)
+
+
+class RouteAdmin(ExtendedModelAdmin):
     list_display = (
         'backend', 'host', 'match', 'display_model', 'display_actions', 'async', 'is_active'
     )
     list_editable = ('host', 'match', 'async', 'is_active')
     list_filter = ('host', 'is_active', 'async', 'backend')
     ordering = ('backend',)
+    add_fields = ('backend', 'host', 'match', 'async', 'is_active')
+    change_form = RouteForm
     
     BACKEND_HELP_TEXT = helpers.get_backends_help_text(ServiceBackend.get_backends())
     DEFAULT_MATCH = {
diff --git a/orchestra/contrib/orchestration/manager.py b/orchestra/contrib/orchestration/manager.py
index 1824c15c..65159cff 100644
--- a/orchestra/contrib/orchestration/manager.py
+++ b/orchestra/contrib/orchestration/manager.py
@@ -62,7 +62,9 @@ def generate(operations):
         if operation.routes is None:
             operation.routes = router.get_routes(operation, cache=cache)
         for route in operation.routes:
-            key = (route, operation.backend)
+            # TODO key by action.async
+            async_action = route.action_is_async(operation.action)
+            key = (route, operation.backend, async_action)
             if key not in scripts:
                 backend, operations = (operation.backend(), [operation])
                 scripts[key] = (backend, operations)
@@ -111,13 +113,13 @@ def execute(scripts, serialize=False, async=None):
     threads_to_join = []
     logs = []
     for key, value in scripts.items():
-        route, __ = key
+        route, __, async_action = key
         backend, operations = value
         args = (route.host,)
         if async is None:
-            is_async = not serialize and route.async
+            is_async = not serialize and (route.async or async_action)
         else:
-            is_async = not serialize and async
+            is_async = not serialize and (async or async_action)
         kwargs = {
             'async': is_async,
         }
diff --git a/orchestra/contrib/orchestration/migrations/0004_route_async_actions.py b/orchestra/contrib/orchestration/migrations/0004_route_async_actions.py
new file mode 100644
index 00000000..25349b84
--- /dev/null
+++ b/orchestra/contrib/orchestration/migrations/0004_route_async_actions.py
@@ -0,0 +1,20 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import models, migrations
+import orchestra.models.fields
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('orchestration', '0003_auto_20150512_1512'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='route',
+            name='async_actions',
+            field=orchestra.models.fields.MultiSelectField(blank=True, max_length=256),
+        ),
+    ]
diff --git a/orchestra/contrib/orchestration/models.py b/orchestra/contrib/orchestration/models.py
index 9a9482fa..1e1f3644 100644
--- a/orchestra/contrib/orchestration/models.py
+++ b/orchestra/contrib/orchestration/models.py
@@ -8,7 +8,7 @@ from django.utils.module_loading import autodiscover_modules
 from django.utils.translation import ugettext_lazy as _
 
 from orchestra.core.validators import validate_ip_address, ValidationError
-from orchestra.models.fields import NullableCharField
+from orchestra.models.fields import NullableCharField, MultiSelectField
 #from orchestra.utils.apps import autodiscover
 
 from . import settings
@@ -157,10 +157,13 @@ class Route(models.Model):
     async = models.BooleanField(default=False,
         help_text=_("Whether or not block the request/response cycle waitting this backend to "
                     "finish its execution. Usually you want slave servers to run asynchronously."))
+    async_actions = MultiSelectField(max_length=256, blank=True,
+        help_text=_("Specify individual actions to be executed asynchronoulsy."))
 #    method = models.CharField(_("method"), max_lenght=32, choices=method_choices,
 #            default=MethodBackend.get_default())
     is_active = models.BooleanField(_("active"), default=True)
     
+    
     class Meta:
         unique_together = ('backend', 'host')
     
@@ -210,6 +213,9 @@ class Route(models.Model):
                 name = type(exception).__name__
                 raise ValidationError(': '.join((name, exception)))
     
+    def action_is_async(self, action):
+        return action in self.async_actions
+    
     def matches(self, instance):
         safe_locals = {
             'instance': instance,
diff --git a/orchestra/contrib/orders/actions.py b/orchestra/contrib/orders/actions.py
index 4e1023da..090baa9b 100644
--- a/orchestra/contrib/orders/actions.py
+++ b/orchestra/contrib/orders/actions.py
@@ -42,6 +42,7 @@ class BillSelectedOrders(object):
                     proforma=form.cleaned_data['proforma'],
                     new_open=form.cleaned_data['new_open'],
                 )
+                print(self.options)
                 if int(request.POST.get('step')) != 3:
                     return self.select_related(request)
                 else:
diff --git a/orchestra/contrib/orders/billing.py b/orchestra/contrib/orders/billing.py
index 56ab1fcb..fb9aa7b4 100644
--- a/orchestra/contrib/orders/billing.py
+++ b/orchestra/contrib/orders/billing.py
@@ -8,6 +8,7 @@ from orchestra.contrib.bills.models import Invoice, Fee, ProForma
 class BillsBackend(object):
     def create_bills(self, account, lines, **options):
         bill = None
+        ant_bill = None
         bills = []
         create_new = options.get('new_open', False)
         proforma = options.get('proforma', False)
@@ -17,24 +18,33 @@ class BillsBackend(object):
                 continue
             service = line.order.service
             # Create bill if needed
-            if bill is None or service.is_fee:
-                if proforma:
+            if proforma:
+                if ant_bill is None:
                     if create_new:
                         bill = ProForma.objects.create(account=account)
                     else:
                         bill = ProForma.objects.filter(account=account, is_open=True).last()
                         if not bill:
                             bill = ProForma.objects.create(account=account, is_open=True)
-                elif service.is_fee:
-                    bill = Fee.objects.create(account=account)
+                    bills.append(bill)
                 else:
+                    bill = ant_bill
+                ant_bill = bill
+            elif service.is_fee:
+                bill = Fee.objects.create(account=account)
+                bills.append(bill)
+            else:
+                if ant_bill is None:
                     if create_new:
                         bill = Invoice.objects.create(account=account)
                     else:
                         bill = Invoice.objects.filter(account=account, is_open=True).last()
                         if not bill:
                             bill = Invoice.objects.create(account=account, is_open=True)
-                bills.append(bill)
+                    bills.append(bill)
+                else:
+                    bill = ant_bill
+                ant_bill = bill
             # Create bill line
             billine = bill.lines.create(
                 rate=service.nominal_price,
diff --git a/orchestra/contrib/orders/forms.py b/orchestra/contrib/orders/forms.py
index 410bad4c..2cdde9f8 100644
--- a/orchestra/contrib/orders/forms.py
+++ b/orchestra/contrib/orders/forms.py
@@ -50,7 +50,7 @@ class BillSelectRelatedForm(AdminFormMixin, forms.Form):
     billing_point = forms.DateField(widget=forms.HiddenInput())
     fixed_point = forms.BooleanField(widget=forms.HiddenInput(), required=False)
     proforma = forms.BooleanField(widget=forms.HiddenInput(), required=False)
-    create_new_open = forms.BooleanField(widget=forms.HiddenInput(), required=False)
+    new_open = forms.BooleanField(widget=forms.HiddenInput(), required=False)
     
     def __init__(self, *args, **kwargs):
         super(BillSelectRelatedForm, self).__init__(*args, **kwargs)
@@ -64,4 +64,4 @@ class BillSelectConfirmationForm(AdminFormMixin, forms.Form):
     billing_point = forms.DateField(widget=forms.HiddenInput())
     fixed_point = forms.BooleanField(widget=forms.HiddenInput(), required=False)
     proforma = forms.BooleanField(widget=forms.HiddenInput(), required=False)
-    create_new_open = forms.BooleanField(widget=forms.HiddenInput(), required=False)
+    new_open = forms.BooleanField(widget=forms.HiddenInput(), required=False)
diff --git a/orchestra/contrib/plans/models.py b/orchestra/contrib/plans/models.py
index b083a570..cd7d6a6a 100644
--- a/orchestra/contrib/plans/models.py
+++ b/orchestra/contrib/plans/models.py
@@ -64,7 +64,7 @@ class RateQuerySet(models.QuerySet):
         return self.filter(
             Q(plan__is_default=True) |
             Q(plan__contracts__account=account)
-        ).order_by('plan', 'quantity').select_related('plan')
+        ).order_by('plan', 'quantity').select_related('plan', 'service')
 
 
 class Rate(models.Model):
diff --git a/orchestra/contrib/plans/ratings.py b/orchestra/contrib/plans/ratings.py
index 18606f7d..d9a69903 100644
--- a/orchestra/contrib/plans/ratings.py
+++ b/orchestra/contrib/plans/ratings.py
@@ -44,24 +44,24 @@ def _compute_steps(rates, metric):
     return value, steps
 
 
-def _prepend_missing(rates):
+def _standardize(rates):
     """
     Support for incomplete rates
     When first rate (quantity=5, price=10) defaults to nominal_price
     """
-    if rates:
-        first = rates[0]
-        if first.quantity == 0:
-            first.quantity = 1
-        elif first.quantity > 1:
-            if not isinstance(rates, list):
-                rates = list(rates)
-            service = first.service
-            rate_class = type(first)
-            rates.insert(0,
-                rate_class(service=service, plan=first.plan, quantity=1, price=service.nominal_price)
+    std_rates = []
+    minimal = rates[0].quantity
+    for rate in rates:
+        if rate.quantity == 0:
+            rate.quantity = 1
+        elif rate.quantity == minimal and rate.quantity > 1:
+            service = rate.service
+            rate_class = type(rate)
+            std_rates.append(
+                rate_class(service=service, plan=rate.plan, quantity=1, price=service.nominal_price)
             )
-    return rates
+        std_rates.append(rate)
+    return std_rates
 
 
 def step_price(rates, metric):
@@ -71,7 +71,7 @@ def step_price(rates, metric):
     group = []
     minimal = (sys.maxsize, [])
     for plan, rates in rates.group_by('plan').items():
-        rates = _prepend_missing(rates)
+        rates = _standardize(rates)
         value, steps = _compute_steps(rates, metric)
         if plan.is_combinable:
             group.append(steps)
@@ -122,7 +122,7 @@ def step_price(rates, metric):
         minimal = min(minimal, (value, result), key=lambda v: v[0])
     return minimal[1]
 step_price.verbose_name = _("Step price")
-step_price.help_text = _("All rates with a quantity lower than the metric are applied. "
+step_price.help_text = _("All rates with a quantity lower or equal than the metric are applied. "
                          "Nominal price will be used when initial block is missing.")
 
 
@@ -132,7 +132,7 @@ def match_price(rates, metric):
     candidates = []
     selected = False
     prev = None
-    rates = _prepend_missing(rates.distinct())
+    rates = _standardize(rates.distinct())
     for rate in rates:
         if prev:
             if prev.plan != rate.plan:
@@ -163,25 +163,42 @@ def best_price(rates, metric):
         raise ValueError("rates queryset should be ordered by 'plan' and 'quantity'")
     candidates = []
     for plan, rates in rates.group_by('plan').items():
-        rates = _prepend_missing(rates)
+        rates = _standardize(rates)
         plan_candidates = []
         for rate in rates:
             if rate.quantity > metric:
                 break
             if plan_candidates:
-                plan_candidates[-1].barrier = rate.quantity
-            plan_candidates.append(AttrDict(
-                price=rate.price,
-                barrier=metric,
-            ))
+                ant = plan_candidates[-1]
+                if ant.price == rate.price:
+                    # Multiple plans support
+                    ant.fold += 1
+                else:
+                    ant.quantity = rate.quantity-1
+                    plan_candidates.append(AttrDict(
+                        price=rate.price,
+                        quantity=metric,
+                        fold=1,
+                    ))
+            else:
+                plan_candidates.append(AttrDict(
+                    price=rate.price,
+                    quantity=metric,
+                    fold=1,
+                ))
         candidates.extend(plan_candidates)
     results = []
     accumulated = 0
     for candidate in sorted(candidates, key=lambda c: c.price):
-        if accumulated+candidate.barrier > metric:
+        if candidate.quantity < accumulated:
+            # Out of barrier
+            continue
+        candidate.quantity *= candidate.fold
+        if accumulated+candidate.quantity > metric:
             quantity = metric - accumulated
         else:
-            quantity = candidate.barrier
+            quantity = candidate.quantity
+        accumulated += quantity
         if quantity:
             if results and results[-1].price == candidate.price:
                 results[-1].quantity += quantity
@@ -192,4 +209,4 @@ def best_price(rates, metric):
                 }))
     return results
 best_price.verbose_name = _("Best price")
-best_price.help_text = _("Produces the best possible price given all active rating lines.")
+best_price.help_text = _("Produces the best possible price given all active rating lines (those with quantity lower or equal to the metric).")
diff --git a/orchestra/contrib/services/models.py b/orchestra/contrib/services/models.py
index 2a6f2574..5bfd55f4 100644
--- a/orchestra/contrib/services/models.py
+++ b/orchestra/contrib/services/models.py
@@ -214,6 +214,7 @@ class Service(models.Model):
                     return decimal.Decimal(str(accumulated))
                 ant_counter = counter
                 accumulated += rate['price'] * rate['quantity']
+            raise RuntimeError("Rating algorithm bad result")
         else:
             if metric < position:
                 raise ValueError("Metric can not be less than the position.")
@@ -221,6 +222,7 @@ class Service(models.Model):
                 counter += rate['quantity']
                 if counter >= position:
                     return decimal.Decimal(str(rate['price']))
+            raise RuntimeError("Rating algorithm bad result")
     
     def get_rates(self, account, cache=True):
         # rates are cached per account
diff --git a/orchestra/contrib/services/tests/test_handler.py b/orchestra/contrib/services/tests/test_handler.py
index fc3a611e..7cc4650a 100644
--- a/orchestra/contrib/services/tests/test_handler.py
+++ b/orchestra/contrib/services/tests/test_handler.py
@@ -32,8 +32,8 @@ class HandlerTests(BaseTestCase):
         'orchestra.contrib.systemusers',
     )
     
-    def create_ftp_service(self):
-        service = Service.objects.create(
+    def create_ftp_service(self, **kwargs):
+        default = dict(
             description="FTP Account",
             content_type=ContentType.objects.get_for_model(SystemUser),
             match='not systemuser.is_main',
@@ -46,10 +46,18 @@ class HandlerTests(BaseTestCase):
             on_cancel=Service.DISCOUNT,
             payment_style=Service.PREPAY,
             tax=0,
-            nominal_price=10,
+            nominal_price=10
         )
+        default.update(kwargs)
+        service = Service.objects.create(**default)
         return service
     
+    def validate_results(self, rates, results):
+        self.assertEqual(len(rates), len(results))
+        for rate, result in zip(rates, results):
+            self.assertEqual(rate['price'], result.price)
+            self.assertEqual(rate['quantity'], result.quantity)
+    
     def test_get_chunks(self):
         service = self.create_ftp_service()
         handler = service.handler
@@ -239,9 +247,7 @@ class HandlerTests(BaseTestCase):
                 'quantity': 21
             }
         ]
-        for rate, result in zip(rates, results):
-            self.assertEqual(rate['price'], result.price)
-            self.assertEqual(rate['quantity'], result.quantity)
+        self.validate_results(rates, results)
         
         dupeplan = Plan.objects.create(
             name='DUPE', allow_multiple=True, is_combinable=True)
@@ -249,9 +255,7 @@ class HandlerTests(BaseTestCase):
         service.rates.create(plan=dupeplan, quantity=3, price=9)
         results = service.get_rates(account, cache=False)
         results = service.rate_method(results, 30)
-        for rate, result in zip(rates, results):
-            self.assertEqual(rate['price'], result.price)
-            self.assertEqual(rate['quantity'], result.quantity)
+        self.validate_results(rates, results)
         
         account.plans.create(plan=dupeplan)
         results = service.get_rates(account, cache=False)
@@ -261,9 +265,7 @@ class HandlerTests(BaseTestCase):
             {'price': decimal.Decimal('9.00'), 'quantity': 5},
             {'price': decimal.Decimal('1.00'), 'quantity': 21},
         ]
-        for rate, result in zip(rates, results):
-            self.assertEqual(rate['price'], result.price)
-            self.assertEqual(rate['quantity'], result.quantity)
+        self.validate_results(rates, results)
         
         hyperplan = Plan.objects.create(
             name='HYPER', allow_multiple=False, is_combinable=False)
@@ -276,9 +278,8 @@ class HandlerTests(BaseTestCase):
             {'price': decimal.Decimal('0.00'), 'quantity': 19},
             {'price': decimal.Decimal('5.00'), 'quantity': 11}
         ]
-        for rate, result in zip(rates, results):
-            self.assertEqual(rate['price'], result.price)
-            self.assertEqual(rate['quantity'], result.quantity)
+        self.validate_results(rates, results)
+        
         hyperplan.is_combinable = True
         hyperplan.save()
         results = service.get_rates(account, cache=False)
@@ -287,9 +288,7 @@ class HandlerTests(BaseTestCase):
             {'price': decimal.Decimal('0.00'), 'quantity': 23},
             {'price': decimal.Decimal('1.00'), 'quantity': 7}
         ]
-        for rate, result in zip(rates, results):
-            self.assertEqual(rate['price'], result.price)
-            self.assertEqual(rate['quantity'], result.quantity)
+        self.validate_results(rates, results)
         
         service.rate_algorithm = 'orchestra.contrib.plans.ratings.match_price'
         service.save()
@@ -335,9 +334,7 @@ class HandlerTests(BaseTestCase):
                 'quantity': 21
             }
         ]
-        for rate, result in zip(rates, results):
-            self.assertEqual(rate['price'], result.price)
-            self.assertEqual(rate['quantity'], result.quantity)
+        self.validate_results(rates, results)
     
     def test_zero_rates(self):
         service = self.create_ftp_service()
@@ -357,9 +354,7 @@ class HandlerTests(BaseTestCase):
             {'price': decimal.Decimal('9.00'), 'quantity': 6},
             {'price': decimal.Decimal('1.00'), 'quantity': 21}
         ]
-        for rate, result in zip(rates, results):
-            self.assertEqual(rate['price'], result.price)
-            self.assertEqual(rate['quantity'], result.quantity)
+        self.validate_results(rates, results)
     
     def test_rates_allow_multiple(self):
         service = self.create_ftp_service()
@@ -375,9 +370,7 @@ class HandlerTests(BaseTestCase):
             {'price': decimal.Decimal('0.00'), 'quantity': 2},
             {'price': decimal.Decimal('9.00'), 'quantity': 28},
         ]
-        for rate, result in zip(rates, results):
-            self.assertEqual(rate['price'], result.price)
-            self.assertEqual(rate['quantity'], result.quantity)
+        self.validate_results(rates, results)
         
         account.plans.create(plan=dupeplan)
         results = service.get_rates(account, cache=False)
@@ -386,9 +379,7 @@ class HandlerTests(BaseTestCase):
             {'price': decimal.Decimal('0.00'), 'quantity': 4},
             {'price': decimal.Decimal('9.00'), 'quantity': 26},
         ]
-        for rate, result in zip(rates, results):
-            self.assertEqual(rate['price'], result.price)
-            self.assertEqual(rate['quantity'], result.quantity)
+        self.validate_results(rates, results)
         
         account.plans.create(plan=dupeplan)
         results = service.get_rates(account, cache=False)
@@ -397,6 +388,150 @@ class HandlerTests(BaseTestCase):
             {'price': decimal.Decimal('0.00'), 'quantity': 6},
             {'price': decimal.Decimal('9.00'), 'quantity': 24},
         ]
-        for rate, result in zip(rates, results):
-            self.assertEqual(rate['price'], result.price)
-            self.assertEqual(rate['quantity'], result.quantity)
+        self.validate_results(rates, results)
+    
+    def test_best_price(self):
+        service = self.create_ftp_service(rate_algorithm='orchestra.contrib.plans.ratings.best_price')
+        account = self.create_account()
+        dupeplan = Plan.objects.create(name='DUPE')
+        account.plans.create(plan=dupeplan)
+        service.rates.create(plan=dupeplan, quantity=0, price=0)
+        service.rates.create(plan=dupeplan, quantity=2, price=9)
+        service.rates.create(plan=dupeplan, quantity=3, price=8)
+        service.rates.create(plan=dupeplan, quantity=4, price=7)
+        service.rates.create(plan=dupeplan, quantity=5, price=10)
+        service.rates.create(plan=dupeplan, quantity=10, price=5)
+        raw_rates = service.get_rates(account, cache=False)
+        results = service.rate_method(raw_rates, 2)
+        rates = [
+            {
+                'price': decimal.Decimal('0.00'),
+                'quantity': 1
+            },
+            {
+                'price': decimal.Decimal('9.00'),
+                'quantity': 1
+            },
+        ]
+        self.validate_results(rates, results)
+        
+        results = service.rate_method(raw_rates, 3)
+        rates = [
+            {
+                'price': decimal.Decimal('0.00'),
+                'quantity': 1
+            },
+            {
+                'price': decimal.Decimal('8.00'),
+                'quantity': 2
+            },
+        ]
+        self.validate_results(rates, results)
+        
+        results = service.rate_method(raw_rates, 5)
+        rates = [
+            {
+                'price': decimal.Decimal('0.00'),
+                'quantity': 1
+            },
+            {
+                'price': decimal.Decimal('7.00'),
+                'quantity': 4
+            },
+        ]
+        self.validate_results(rates, results)
+        
+        results = service.rate_method(raw_rates, 9)
+        rates = [
+            {
+                'price': decimal.Decimal('0.00'),
+                'quantity': 1
+            },
+            {
+                'price': decimal.Decimal('7.00'),
+                'quantity': 4
+            },
+            {
+                'price': decimal.Decimal('10.00'),
+                'quantity': 4
+            },
+        ]
+        self.validate_results(rates, results)
+        
+        results = service.rate_method(raw_rates, 10)
+        rates = [
+            {
+                'price': decimal.Decimal('0.00'),
+                'quantity': 1
+            },
+            {
+                'price': decimal.Decimal('5.00'),
+                'quantity': 9
+            },
+        ]
+        self.validate_results(rates, results)
+        
+    def test_best_price_multiple(self):
+        service = self.create_ftp_service(rate_algorithm='orchestra.contrib.plans.ratings.best_price')
+        account = self.create_account()
+        dupeplan = Plan.objects.create(name='DUPE')
+        account.plans.create(plan=dupeplan)
+        account.plans.create(plan=dupeplan)
+        service.rates.create(plan=dupeplan, quantity=0, price=0)
+        service.rates.create(plan=dupeplan, quantity=2, price=9)
+        service.rates.create(plan=dupeplan, quantity=3, price=8)
+        service.rates.create(plan=dupeplan, quantity=4, price=7)
+        service.rates.create(plan=dupeplan, quantity=5, price=10)
+        service.rates.create(plan=dupeplan, quantity=10, price=5)
+        raw_rates = service.get_rates(account, cache=False)
+        
+        results = service.rate_method(raw_rates, 3)
+        rates = [
+            {
+                'price': decimal.Decimal('0.00'),
+                'quantity': 2
+            },
+            {
+                'price': decimal.Decimal('8.00'),
+                'quantity': 1
+            },
+        ]
+        self.validate_results(rates, results)
+        
+        results = service.rate_method(raw_rates, 10)
+        rates = [
+            {
+                'price': decimal.Decimal('0.00'),
+                'quantity': 2
+            },
+            {
+                'price': decimal.Decimal('5.00'),
+                'quantity': 8
+            },
+        ]
+        self.validate_results(rates, results)
+        
+        account.plans.create(plan=dupeplan)
+        raw_rates = service.get_rates(account, cache=False)
+        
+        results = service.rate_method(raw_rates, 3)
+        rates = [
+            {
+                'price': decimal.Decimal('0.00'),
+                'quantity': 3
+            },
+        ]
+        self.validate_results(rates, results)
+        
+        results = service.rate_method(raw_rates, 10)
+        rates = [
+            {
+                'price': decimal.Decimal('0.00'),
+                'quantity': 3
+            },
+            {
+                'price': decimal.Decimal('5.00'),
+                'quantity': 7
+            },
+        ]
+        self.validate_results(rates, results)
diff --git a/orchestra/contrib/webapps/backends/__init__.py b/orchestra/contrib/webapps/backends/__init__.py
index b750b114..bcf63ffe 100644
--- a/orchestra/contrib/webapps/backends/__init__.py
+++ b/orchestra/contrib/webapps/backends/__init__.py
@@ -29,9 +29,9 @@ class WebAppServiceMixin(object):
         if context['under_construction_path']:
             self.append(textwrap.dedent("""\
                 if [[ $CREATED == 1 && ! $(ls -A %(app_path)s) ]]; then
-                    # Async wait for other backends to do their thing or cp under construction
+                    # Async wait 2 more seconds for other backends to lock app_path or cp under construction
                     nohup bash -c '
-                        sleep 10
+                        sleep 2
                         if [[ ! $(ls -A %(app_path)s) ]]; then
                             cp -r %(under_construction_path)s %(app_path)s
                             chown -R %(user)s:%(group)s %(app_path)s
diff --git a/orchestra/contrib/webapps/backends/wordpress.py b/orchestra/contrib/webapps/backends/wordpress.py
index 9a31cb6f..5a2454ed 100644
--- a/orchestra/contrib/webapps/backends/wordpress.py
+++ b/orchestra/contrib/webapps/backends/wordpress.py
@@ -43,7 +43,8 @@ class WordPressBackend(WebAppServiceMixin, ServiceController):
                 die("App directory not empty.");
             }
             shell_exec("mkdir -p %(app_path)s
-                rm -f %(app_path)s/index.html
+                # Prevent other backends from writting here
+                touch %(app_path)s/.lock
                 filename=\\$(wget https://wordpress.org/latest.tar.gz --server-response --spider --no-check-certificate 2>&1 | grep filename | cut -d'=' -f2)
                 mkdir -p %(cms_cache_dir)s
                 if [ \\$(basename \\$(readlink %(cms_cache_dir)s/wordpress) 2> /dev/null ) != \\$filename ]; then
@@ -54,7 +55,9 @@ class WordPressBackend(WebAppServiceMixin, ServiceController):
                     tar -xzvf %(cms_cache_dir)s/wordpress -C %(app_path)s --strip-components=1
                 fi
                 mkdir %(app_path)s/wp-content/uploads
-                chmod 750 %(app_path)s/wp-content/uploads");
+                chmod 750 %(app_path)s/wp-content/uploads
+                rm %(app_path)s/.lock
+                ");
             
             $config_file = file('%(app_path)s/' . 'wp-config-sample.php');
             $secret_keys = file_get_contents('https://api.wordpress.org/secret-key/1.1/salt/');
diff --git a/orchestra/models/fields.py b/orchestra/models/fields.py
index 3b12deb1..3b34c934 100644
--- a/orchestra/models/fields.py
+++ b/orchestra/models/fields.py
@@ -27,10 +27,6 @@ class MultiSelectField(models.CharField, metaclass=models.SubfieldBase):
     
     def to_python(self, value):
         if value:
-#            if isinstance(value, tuple) and value[0].startswith('('):
-#                # Workaround unknown bug on default model values
-#                # [u"('SUPPORT'", u" 'ADMIN'", u" 'BILLING'", u" 'TECH'", u" 'ADDS'", u" 'EMERGENCY')"]
-#                value = list(eval(', '.join(value)))
             if isinstance(value, str):
                 return value.split(',')
             return value
@@ -44,11 +40,12 @@ class MultiSelectField(models.CharField, metaclass=models.SubfieldBase):
             setattr(cls, 'get_%s_display' % self.name, func)
     
     def validate(self, value, model_instance):
-        arr_choices = self.get_choices_selected(self.get_choices_default())
-        for opt_select in value:
-            if (opt_select not in arr_choices):
-                msg = self.error_messages['invalid_choice'] % value
-                raise exceptions.ValidationError(msg)
+        if self.choices:
+            arr_choices = self.get_choices_selected(self.get_choices_default())
+            for opt_select in value:
+                if (opt_select not in arr_choices):
+                    msg = self.error_messages['invalid_choice'] % {'value': opt_select}
+                    raise exceptions.ValidationError(msg)
     
     def get_choices_selected(self, arr_choices=''):
         if not arr_choices: