Why is it that factions can join wars against my vassals without the overlord being asked to join? In this case I was playing Rome and my vassal was at war with Libya which was joined by Chartage. When a faction becomes a vassal all current wars should be ended that the vassal currently is in. Also if the overlord asks them to join a war that should accept or war should be declared on their overlord.
Another annoying thing is all the diplomatic requests done by the AI each turn. If I said NO to a certain request they should at least not ask the same thing for 4 - 8 turns. Currently the same request is appearing almost every turn.