diff --git a/pandora/clip/managers.py b/pandora/clip/managers.py
index 21a06c8b4..93044c040 100644
--- a/pandora/clip/managers.py
+++ b/pandora/clip/managers.py
@@ -23,7 +23,6 @@ def parseCondition(condition, user):
     k = condition.get('key', 'name')
     k = {
         'event': 'annotations__events__id',
-        'id': 'public_id',
         'in': 'start',
         'out': 'end',
         'place': 'annotations__places__id',
@@ -53,14 +52,17 @@ def parseCondition(condition, user):
     if op == '-':
         q = parseCondition({'key': k, 'value': v[0], 'operator': '>='}, user) \
             & parseCondition({'key': k, 'value': v[1], 'operator': '<'}, user)
-        if exclude:
-            return ~q
-        else:
-            return q
+        return exclude and ~q or q
     if (not exclude and op == '=' or op in ('$', '^', '>=', '<')) and v == '':
         return Q()
 
-    if k.endswith('__id'):
+    if k == 'id':
+        itemId, points = v.split('/')
+        points = [float('%0.03f'%float(p)) for p in points.split('-')]
+        q = Q(item__itemId=itemId, start=points[0], end=points[1])
+        return exclude and ~q or q
+
+    elif k.endswith('__id'):
         v = decode_id(v)
     if isinstance(v, bool): #featured and public flag
         key = k
diff --git a/pandora/clip/models.py b/pandora/clip/models.py
index bac42751a..37a7c9b95 100644
--- a/pandora/clip/models.py
+++ b/pandora/clip/models.py
@@ -26,7 +26,6 @@ class MetaClip:
             self.volume = 0
   
     def save(self, *args, **kwargs):
-        self.public_id = u"%s/%0.03f-%0.03f" %(self.item.itemId, float(self.start), float(self.end))
         if self.duration != self.end - self.start:
             self.update_calculated_values()
         if not self.aspect_ratio and self.item:
@@ -89,10 +88,11 @@ class MetaClip:
     def get_or_create(cls, item, start, end):
         start = float(start)
         end = float(end)
-        public_id = u"%s/%0.03f-%0.03f" %(item.itemId, start, end)
-        qs = cls.objects.filter(public_id=public_id)
+        start = float('%0.03f' % start)
+        end = float('%0.03f' % end)
+        qs = cls.objects.filter(item=item, start=start, end=end)
         if qs.count() == 0:
-            clip = Clip(item=item, start=start, end=end, public_id=public_id)
+            clip = Clip(item=item, start=start, end=end)
             clip.save()
             created = True
         else:
@@ -100,6 +100,10 @@ class MetaClip:
             created = False
         return clip, created
 
+    @property
+    def public_id(self):
+        return u"%s/%0.03f-%0.03f" %(self.item.itemId, float(self.start), float(self.end))
+
     def __unicode__(self):
         return self.public_id
 
@@ -112,7 +116,6 @@ attrs = {
     'objects': managers.ClipManager(),
     'created': models.DateTimeField(auto_now_add=True),
     'modified': models.DateTimeField(auto_now=True),
-    'public_id': models.CharField(max_length=128, unique=True),
     'aspect_ratio': models.FloatField(default=0),
 
     'item': models.ForeignKey('item.Item', related_name='clips'),
diff --git a/pandora/clip/views.py b/pandora/clip/views.py
index 0024c7cdf..a39c96b50 100644
--- a/pandora/clip/views.py
+++ b/pandora/clip/views.py
@@ -60,8 +60,13 @@ def order_query(qs, sort):
         elif key not in clip_keys:
             #key mgith need to be changed, see order_sort in item/views.py
             key = "sort__%s" % key
-        order = '%s%s' % (operator, key)
-        order_by.append(order)
+        if key == 'public_id':
+            order_by.append('%s%s' % (operator, 'sort__itemId'))
+            order_by.append('%s%s' % (operator, 'start'))
+            order_by.append('end')
+        else:
+            order = '%s%s' % (operator, key)
+            order_by.append(order)
     if order_by:
         qs = qs.order_by(*order_by, nulls_last=True)
     return qs
@@ -102,15 +107,19 @@ def findClips(request):
         response['data']['items'] = [add(p) for p in qs]
         keys = data['keys']
 
+        def clip_public_id(c):
+            return u'%s/%0.03f-%0.03f' % (c['public_id'].split('/')[0], c['clip__start'], c['clip__end'])
+
         def add_annotations(key, qs, add_layer=False):
-            values = ['public_id', 'value', 'clip__public_id']
+            values = ['public_id', 'value', 'clip__start', 'clip__end']
             if add_layer:
                 values.append('layer')
             if query['filter']:
                 qs = qs.filter(query['filter'])
             for a in qs.values(*values):
+                public_id = clip_public_id(a)
                 for i in response['data']['items']:
-                    if i['id'] == a['clip__public_id']:
+                    if i['id'] == public_id:
                         if not key in i:
                             i[key] = []
                         l = {
@@ -130,7 +139,8 @@ def findClips(request):
                 add_annotations(layer, aqs)
     elif 'position' in query:
         qs = order_query(qs, query['sort'])
-        ids = [i['public_id'] for i in qs.values('public_id')]
+        ids = [u'%s/%0.03f-%0.03f' % (c['item__itemId'], c['start'], c['end'])
+            for c in qs.values('item__itemId', 'start', 'end')]
         data['conditions'] = data['conditions'] + {
             'value': data['position'],
             'key': query['sort'][0]['key'],
@@ -142,7 +152,8 @@ def findClips(request):
             response['data']['position'] = utils.get_positions(ids, [qs[0].itemId])[0]
     elif 'positions' in data:
         qs = order_query(qs, query['sort'])
-        ids = [i['public_id'] for i in qs.values('public_id')]
+        ids = [u'%s/%0.03f-%0.03f' % (c['item__itemId'], c['start'], c['end'])
+            for c in qs.values('item__itemId', 'start', 'end')]
         response['data']['positions'] = utils.get_positions(ids, data['positions'])
     else:
         response['data']['items'] = qs.count()
diff --git a/pandora/item/models.py b/pandora/item/models.py
index 20395324a..bc68a454e 100644
--- a/pandora/item/models.py
+++ b/pandora/item/models.py
@@ -40,7 +40,7 @@ import archive.models
 
 from person.models import get_name_sort
 from title.models import get_title_sort
-from sequence.tasks import get_sequences, update_sequence_ids
+from sequence.tasks import get_sequences
 
 def get_id(info):
     q = Item.objects.all()
@@ -367,9 +367,8 @@ class Item(models.Model):
             for c in self.clips.all(): c.save()
             for a in self.annotations.all():
                 public_id = a.public_id.split('/')[1]
-                a.public_id = "%s/%s" % ( self.itemId, public_id)
+                a.public_id = "%s/%s" % (self.itemId, public_id)
                 a.save()
-            update_sequence_ids.delay(self.itemId)
         if update_poster:
             return tasks.update_poster.delay(self.itemId)
 
diff --git a/pandora/sequence/managers.py b/pandora/sequence/managers.py
index 272330dec..fd244e44e 100644
--- a/pandora/sequence/managers.py
+++ b/pandora/sequence/managers.py
@@ -22,7 +22,6 @@ def parseCondition(condition, user):
     '''
     k = condition.get('key', 'name')
     k = {
-        'id': 'public_id',
         'in': 'start',
         'out': 'end'
     }.get(k, k)
@@ -41,13 +40,16 @@ def parseCondition(condition, user):
     if op == '-':
         q = parseCondition({'key': k, 'value': v[0], 'operator': '>='}, user) \
             & parseCondition({'key': k, 'value': v[1], 'operator': '<'}, user)
-        if exclude:
-            return ~q
-        else:
-            return q
+        return exclude and ~q or q
     if (not exclude and op == '=' or op in ('$', '^', '>=', '<')) and v == '':
         return Q()
 
+    if k == 'id':
+        itemId, points = v.split('/')
+        points = [float('%0.03f'%float(p)) for p in points.split('-')]
+        q = Q(item__itemId=itemId, start=points[0], end=points[1])
+        return exclude and ~q or q
+
     if k.endswith('__id'):
         v = decode_id(v)
     if isinstance(v, bool): #featured and public flag
diff --git a/pandora/sequence/models.py b/pandora/sequence/models.py
index 2ef6b060d..2469c1d10 100644
--- a/pandora/sequence/models.py
+++ b/pandora/sequence/models.py
@@ -19,10 +19,9 @@ from django.db import models
 
 class Sequence(models.Model):
     class Meta:
-        unique_together = ("public_id", "mode")
+        unique_together = ("item", "start", "end", "mode")
 
     mode = models.CharField(max_length=128)
-    public_id = models.CharField(max_length=128)
     item = models.ForeignKey(Item, null=True, related_name='sequences')
     sort = models.ForeignKey(ItemSort, null=True, related_name='sequences')
     user = models.IntegerField(db_index=True, null=True)
@@ -35,15 +34,16 @@ class Sequence(models.Model):
     objects = managers.SequenceManager()
 
     def save(self, *args, **kwargs):
-        self.public_id = u"%s/%0.03f-%0.03f" % (
-            self.item.itemId, float(self.start), float(self.end)
-        )
         self.duration = self.end - self.start
         if self.item:
             self.user = self.item.user and self.item.user.id
             self.sort = self.item.sort
         super(Sequence, self).save(*args, **kwargs)
 
+    @property
+    def public_id(self):
+        return u"%s/%0.03f-%0.03f" % (self.item.itemId, float(self.start), float(self.end))
+
     def __unicode__(self):
         return self.public_id
 
diff --git a/pandora/sequence/tasks.py b/pandora/sequence/tasks.py
index 00a2bb045..19551fefc 100644
--- a/pandora/sequence/tasks.py
+++ b/pandora/sequence/tasks.py
@@ -33,9 +33,6 @@ def get_sequences(itemId):
                     'end': float('%0.03f' % s['out']),
                     'hash': s['hash']
                 }
-                sequence['public_id'] = u"%s/%0.03f-%0.03f" % (
-                    i.itemId, sequence['start'], sequence['end']
-                )
                 sequence['duration'] = sequence['end'] - sequence['start']
                 if not keys:
                     keys = ', '.join(['"%s"'%k for k in sequence.keys()])
@@ -48,7 +45,3 @@ def get_sequences(itemId):
             cursor.execute(sql)
             transaction.commit_unless_managed()
 
-@task(ignore_results=True, queue='encoding')
-def update_sequence_ids(itemId):
-    for s in models.Sequence.objects.filter(item__itemId=itemId):
-        s.save()