You can do a revote to other lords if another clan leader is ruling that land for you. just not for yourself. if you are the one ruling that land you are stuck with it
If they leave your faction you keep the castle or city. unless you they join another faction you are at war with. Also if they leave your faction. You didn't work on your relationship with your lords
If you think this is a page of a book. You haven't read many books. This is in detail to explain why this is game breaking.
It's to late for that i voted myself. An now there's no way to redo the vote.
I don't think you read what I said. He doesn't have a clan LEADER. Meaning there's no one to talk to, to get him to join. Even if I make up for killing his last clan leader.