I created a ground floor for my house. I put a room in. Then I deleted the inner walls so it's just perimeter walls but when I batch tile the floor area that section where the room was stays the same, it treats it like those walls still exist and that it's an enclosed area. Then when I did that section manually so it was all using the same tile and should definitely have been altered all at once I tried to batch edit the floor area again and it still treated the two areas as separate! Then I couldn't put floor tile on the second floor area directly above the problematic area on the second floor until I put back the original walls I'd deleted on the first floor where they were first and my supporting grid squares appeared and let me tile them. Before, it all went through to the first floor again. I think it's relevant that in the prebuilt house my main family is in I once deleted a whole room at once and it took the floor tile with it. It was on the second floor and it did the same thing wouldn't let me tile on that spot it dropped to the floor underneath. Thank God for undo. What am I doing wrong?