diff --git a/app/controllers/watcher_groups_controller.rb b/app/controllers/watcher_groups_controller.rb
index 6cf3695..3c43578 100644
--- a/app/controllers/watcher_groups_controller.rb
+++ b/app/controllers/watcher_groups_controller.rb
@@ -66,7 +66,7 @@ def destroy
   end
 
   def autocomplete_for_group
-    @groups = Group.active.like(params[:q]).find(:all, :limit => 100)
+    @groups = Group.sorted.active.like(params[:q]).limit(100)
     if @watched
       @groups -= @watched.watcher_groups
     end
diff --git a/lib/watcher_groups_issue_patch.rb b/lib/watcher_groups_issue_patch.rb
index d9203ab..786354f 100644
--- a/lib/watcher_groups_issue_patch.rb
+++ b/lib/watcher_groups_issue_patch.rb
@@ -88,15 +88,15 @@ def notified_watchers_with_groups
           if respond_to?(:visible?)
             group_users.reject! {|user| !visible?(user)}
           end
-          notified += group_users
+          notified |= group_users
       end
 
-      notified += watcher_users.to_a
+      notified |= watcher_users.to_a
       notified.reject! {|user| user.mail.blank? || user.mail_notification == 'none'}
       if respond_to?(:visible?)
         notified.reject! {|user| !visible?(user)}
       end
-      notified.uniq
+      notified
     end
 
     def watched_by_with_groups?(user)
@@ -108,10 +108,12 @@ def watched_by_with_groups?(user)
 
     def watcher_users_with_users
       users = watcher_users_without_users
+      old_object = users
       watcher_groups.each do |g|
-        users += g.users
+        users |= g.users
       end if self.id?
-      users.uniq
+      users.define_singleton_method(:reset) do old_object.reset end if old_object.class != users.class
+      users
     end
   end
 end