Tell me if I am wrong, but some settings changed about AIs right? I mean yesterday we discovered that AIs could not let us take their territories, they actually attacked me and my teammate!
I don't know for sure (since I don't run this site), but it seems to me that you are mistaken. The AIs appear to behave as they always have.
The AIs have always* had the ability to attack a teammate, in order to complete bonuses. They rarely do so, but it does happen under the right circumstances.
*: Not speaking literally here, of course.
Edited 4/4/2015 20:00:11