I have high spots that pop up on my leveled area in my tribe after a few days. I have re-leveled it three times now and they keep popping back up. When they pop up there not raised by much maybe .10/.20 but with the way walls and things are you have to tear everything down and level it again then rebuild. (It's not in just one spot it seams to be random.) I even have some stairs that are low enough were i can pull a cart up them and the high spots make it to were you can't use them anymore without getting stuck.