diff --git a/hamster-export b/hamster-export
index 39bae6c..4589787 100755
--- a/hamster-export
+++ b/hamster-export
@@ -101,14 +101,19 @@ class Timesheet(object):
             if len(items) > 1:
                 item.duration = sum(map(operator.attrgetter('duration'),
                                         items))
+
+                item.description = ', '.join(set(
+                    filter(lambda i: i and i.strip() or '',
+                           map(operator.attrgetter('description'), items))))
             return item
 
-        key = operator.attrgetter('date', 'name', 'description')
+        key = operator.attrgetter('date', 'name')
         merged = []
         for key, items in itertools.groupby(sorted(self.entries, key=key),
                                             key=key):
             merged.append(merge(list(items)))
-        self._entries = merged
+        # sort by date and duration
+        self._entries = sorted(merged, key=lambda i: (i.date, -i.duration))
 
     def check_activities(self, activities):
         patterns = set(map(operator.attrgetter('name'), activities))