You should allow for up to 19 teams in guillotine leagues. I've been running two leagues on your site for years and my leaguemates and I were very much looking forward to using your new live scoring. Unfortunately we can't because I'm not allowed to change the type of league due to the league size. Having a guillotine league go to Week 18 isn't problematic the way it is in regular leagues because if you have one of your studs benched, there are still plenty of studs available due to the fact that there are only two teams left.