Hey Charles, I noticed most of the transactions are from back when all rewards where doubled, correct? I am not aware of any fork at that time as long as you were updating your client under the old developer, he was maintaining updates back then. Anyway as long as there wasn't a large fork and you weren't mining solo on your own dead end those should be on the main chain. Also are* some of those from Minar pool, there was a brief period of a dead chain but those dates seem to be before that?
I will look into history of coin first week of release.
edit.. you just ran the new client for the first time today?