I did some tests on my game, and I was playing Twinbrook, with some families, they were vampires and 5 star celebrities, I did not add any of the community lots from sims ambitions and no communtiy lots from late night and no night clubs in this world. I played this world for about 10 weeks and I did not have any invisible sims, there where no lags and no freezes!!!. However when I then started a new world saved that is when both the worlds started to freeze and lag. I then deleted these two worlds and started a new world. The new world has just the nightclubs on it, but playing the same family, it just has one invisible sim that has shown up, there are no Freezes and lags!!! I am not sure if this test means anything, but this is what has happened on my game!!!
