Undercity - Sims 3 Ghetto (Now Populated!)

Looks like a cloning issue. I have seen a few posts about sims disappearing or being cloned caused by some incompatabilities with Uni and some mods - but have not seen it myself. I am not sure if they meant massive cloning like that or not. I know one of the uncompatable mods was the Traveller mod - I don't recall what else but I know there was problems with at least 3 of Twallans mods - I believe it was in Crinricts bug thread.