I get that Ulti would see a Chris lynch as just too juicy to pass up. But he must have known he would look bad for it. He must have been desperate. If Lea/Chris was town, he'd be better off leaving two town in the lead. It's pretty clear that he was trying to sinch the Chris lynch because the other two lynch leaders were scum.
Right I didn't get a chance to get to this part of the game before having to be dad for the day but yeah that's right now, Ulti totally doesn't do that if Lea is town.