Forced to stay off the clock?

So I'm scheduled to leave at 10:30pm when I close. I always left at that time but now I'm being told I have to stay with the closing TL even when they know I'm off the clock. Sometimes I'm waiting 20 minutes because the door alarm is on. A second team lead is also having to stay when they are off the clock while the other closing leader is still writing his evening emails. Is this normal?