Sorry if these questions are basic, but I am trying to learn as I go and can find the solutions. I tried the suggestions, watched several videos and reviewed the manuals, but still having the same issue. Anytime I make changes to the garage, the same (elevation) changes re made to the main house (and vice verse). Can I separate the two of them so they have different foundations? (if I highlight the garage and reduce the floor height, the garage foundation rises and sinks according) I tried highlighting them separately and appears they are separate entities, but whatever I do to one of the structures, it effects the other one.