Those social group townies are so fast, they don't even inspect the apartments. They just make a bee line for a door and take it. It's not as bad on larger lots but since I am mostly playing the Short Street minis from here it's become a problem. The only way I have been able to get around it is to use moveobjects on and park the sim in front of the door, rent it then exit quickly and do the same until all the apartments are taken. I hope that's not a VBT because it's the only way I have been able to stop them.

I had that as well with a clean game, new neighbourhood and no hacks or cc. And nothing I did would stop them popping up.