diff --git a/src/message/simple_edits.py b/src/message/simple_edits.py
index e6c76d0..8ef708d 100644
--- a/src/message/simple_edits.py
+++ b/src/message/simple_edits.py
@@ -1,5 +1,5 @@
 from message.message import Message
-from message.simple_messages import NoReset
+from message.simple_messages import NoReset, DataChgClickMessage
 import message.common_accessors as common_accessors
 from browser import document
 from model import Sense, Example
@@ -100,14 +100,14 @@ class EditEntryLabels(Message):
         model.entry.labels = labels
         
         
-class ExampleClusterEdit(NoReset):
+class ExampleClusterEdit(DataChgClickMessage):
     def update_model(self, model):
         example = self.get_arg(0, Example)
         cluster = self.get_arg(1, int)
         example.set_cluster(cluster)
         
         
-class ExampleClusterAdd(NoReset):
+class ExampleClusterAdd(DataChgClickMessage):
     def update_model(self, model):
         example = self.get_arg(0, Example)
         
diff --git a/src/model/example_clusters.py b/src/model/example_clusters.py
index e74b9bf..ccdf9af 100644
--- a/src/model/example_clusters.py
+++ b/src/model/example_clusters.py
@@ -40,7 +40,7 @@ class ExampleClusters:
                 self.lists[key].add(cluster)
                     
         for key in self.lists.keys():
-            self.lists[key] = sorted(self.lists[key], key=lambda x: x)
+            self.lists[key] = sorted(self.lists[key], key=lambda x: int(x))
     
     def _get_list(self, sense, example):
         key = ExampleClusters.get_key(sense, example)