I'm not sure if this is a bug. I began as the Duchy of Apulia and went on to become Kingdom of Sicily. Sometime in the 12th century the Archbishop of Spoleto asked to become my vassal. Ok, no big deal. Then a few months later I got the realm duress trait. During this same period, the count of boulogne asked to be vassalized, followed by at least 3 or 4 other dutch states in rapid succession, culminating in the rather large duchy of Holland. I had no claims on any of them. I held no Dutch titles. I controlled nothing outside Italy except for a piece of land in Norway a vassal somehow picked up. :wacko: