So, I've noticed that lots disappearing is a very common problem.
Other than re-installing the game, or loading an earlier save, there hasn't been a true solution found. I'm really irritated at this point, because this will be the third time this has happened to me. All of my lots have disappeared, the ones I've built myself anyway.
I've noticed that they always disappear when I have created more than 4 played households. So I'm wondering if that has anything to do with it? Or maybe there is just a screw up in my files somewhere?
Any feedback on this topic would be appreciated, I'd really like an answer, or any suggestions on how to keep this from happening.