Also Related to 183
When an announcement is revised, the date shown for the announcement doesn't change. This affects the synoptic tools as well, and hampers their use when migrated from one site to another (the date may be a year old, and reposting the announcemnet doesn't change the date).
Adding a column - Last Revised - to the list, and using the last revised date as the default sort, and for determining what shows in the synoptic tool will help. When an announcement is in draft form and then posted, the last revised date would be the date of the post.