This is a really odd occurrence and I have no idea where to start fixing it. I'm not even sure if it's an ATA issue.
When I Googled my name recently (taylor eason) to see if it was showing up in the results, Google is using my Twitter feed (pulled, I suppose, from my Twitter Widget Pro feed) as the description of the site instead of where it's defined in the ATA metatag settings (assuming that's where Google pulls it from).
The same thing happens when I post a link on Facebook, although it pulls from the Twitter hashtag widget I use. It shows the correct photo and post name, but not the excerpt or the first few lines of the post.
Any ideas out there?