Yes, that happens to me too, but these sims didn't fill in, they stayed invisible. If you are playing the the household, the only way you know a sim is invisible is if you make them the active sim and you see their plumbob. Strange little town, lol. There are quite a few gravestones scattered all over town. I posted something a while back about who they are and what relation, if any, they are to the townspeople that are still alive. It was an interesting link.