Ideas
I have Caleb Vatore in the household that I'm playing with and one other sim in this household has a small business. I just have that small business mostly running on its own in the little separate room I built on the same lot as the household lot.
But I noticed that when a werewolf sim comes as a customer to the small business and Caleb happens to be in that room, the "Customer" label disappears from that werewolf's headline and that werewolf can suddenly walk into the rooms I set as Residential. I can't have my business owner sim ask this werewolf to leave because they're not a customer anymore, but there is no "ask to leave" option in the sim pie menu, because I think since this sim wasn't technically a regular guest either. Even when I close the business, the werewolf remains on the lot. It fixes itself when I travel to a different lot, but I'd rather not have to do that every time.
And this only happens when it's a werewolf customer and I have a vampire in the household. Maybe the same happens when it's a vampire customer with a werewolf in the household.