Cdinero Do the lots appear correctly on the world map screen? Are the lots actually gone when you load into one of them and/or the sims on them are either standing on the street in front or entirely missing? And do the lots have a triangle with an exclamation point in them over the lots on the map screen? Or are they reverting to what they looked like when you started a new game or invisible when you load into a lot and look around the zone/neighborhood? If the latter is the case, you probably have this bug: Neighboring Houses show as Default/Empty | EA Forums - 11903590
Hope this helps.