my 2 cents.

[gts2096]

I'm the Juliei. Carthage comes ashore on my territory and we are at war, not because of my house but one of the other houses. so, i quickly dispatch a diplomat and get cease fire for 100 denarii. then i ask for trade rights and get that. my thoughts.........I personally never declared war on Carthage. I'm at war because the Senate says so.....Is the Carthage AI seeing me as a potential friend??? Or is the Carthage AI being stupid??? Irregardless, I LOVE THIS GAME...

[Siris]

Hm, questions questions, questions. Not sure bro, but I'd say that its programmed to become your enemy if it is attacked by other families of the Romans, but then it may not be programmed to stay your enemies.

My experience was, that when some of the Romans enemied me, the others didnt, and in other Campaigns, when some of them enemied me, say Bruti, but not Scippi or Juli, they all enemied me. Just random selection possibly?