@SparklePlumley - I do have the Vampire GP, but they're not vampires, just regular townies. And they don't come in the house, just come to the front door and knock a few times before wandering off (if I don't interact with them).
@rosemow - Thanks, but that doesn't really help. I live on a lot, not an apartment. And as I stated above, the sims don't actually come inside unless invited to. They just constantly show up and knock at the door for a while before wandering off. Ty for attempting to help tho, it's appreciated.