I also had a 05 5342, and like Chuck Q mentioned, I found the factory did a poor job of folding the bedroom slide rubber roofing material on both top corners facing the inside of the room. Water leaked inside, unknowingly at times. With the slide in, standing on the bed with a mirror and a bright light I saw the open gaps in the rubber roof material corner folds and applied Dicor with my fingers to seal the open areas.
However, I never noticed the slide not positioning correctly when it was out, it seemed like it moved out till the inside frame pushed against the wall top to bottom. I had the same problem with my current 08 3555, water leaked down into the slides floor rotting the wood floor panel above the fiberglass sheet. This caused the slide to be low on one side, in my case, as the floor was depressed and soft where it rested on the roller. Good luck finding the problem.
Ellen & Greg
08 National Dolphin DL-35Ci, RoadMaster Rear Sway Bar, Rear Trac Bar,
Workhorse W22, Kelderman Air Ride, Towing 08 Smart Car