Another quick thing to check is that you haven't placed any item over or near the bed with the MOO cheat as this can cause issues too. As always save your game before doing any of this just in case something goes wrong for you as then you can quit without saving and you will not be any the worse off. Move your sims back in again using the phone interaction. Bulldoze their house and then replace it with the copy from your library. So, save your house to your library and then move you sims onto an empty lot using the phone interaction. Seems one of the best ways to fix it in a vanilla game is to temporarily move your sims out. This glitch does happen from time to time.
