Quote Originally Posted by Revenant69
When the senate gave me a mission to take Appolonia that was held by Macedonians, I borrowed money and sent an expeditionary force there. But by the time it got there the Brutii finally managed to take Appolonia. So I ended up not even declaring war on Macedonians, but money for it was already pocketed I call that Roman Politics They didn't complain then, why should they complain now???

That explains it right there. Some diplomatic deals appear to have an expiration. You can only milk diplomatic favours from factions in diplomatic deals for certain things, once about every 30-50 turns. It's to help prevent a player from getting money for each time they attack a faction.

With patch 1.3 I was the Julii and Scipii were assaulting the Carthies. Carthage came up and asked for an alliance. Well I made a counter offer to my favour and made an alliance. A few turns later the Scipii give me the transgression message. And even though they were my ally carthage got assaulted again.

So rule of thumb don't piss off your Roman buddies or it may cost you. But they may be exactly what you want

Anyways all Transgression messages I have gotten have pretty much made sense in a round about way.