During PDI, I noticed the living room slide dragging the floor and leaving black marks. Obviously needed adjusting. Dealer adjusted and when I went back to pick it up, slide had dropped again and was rubbing floor. While I waited they adjusted slide a 2nd time. Pulled it home and set it up in driveway to find was dragging again. Anybody have this issue? It's obvious where it's sliding on the floor due to black streaks and indenting in floor. Starting to get nervous!!