When I park on a spot I get out my handy four foot level and place it on the floor inside the door (side to side of course) in front of the refrigerator and steps in our 32RL. I then either raise up one side or the other (pulling onto wood blocks) to get the unit level side to side. After checking the level and determining I am at or as close to level as I can get, I unhitch and finish set up. When we have the slides open and feel we are all set, lo and behold the trailer is not level - on the landing in front of the bath no is the bathroom floor. No mater what I do that area is going down hill toward the curb side. Is it me, after 35 years of RVing I still can't level a unit or is the frame warping or twisted?