It is a brand new unit and Pacific coach works or the dealer should correct the issues he has concerns with. Keep an eye on the roof to see if it gets bigger over time I think it's adhesion problems. If you really want to get it fixed go up there pull on it a few times and make "24x24";) As for the hitch I would try a new ball hook it up to the truck and play with it or try to do the exact thing you did backing up to see if it happens again.
We bought our toy hauler new 2013 pacific coach works powerlite. So far our unit has been good to us and we're happy with it. Curious what dealership you got yours from? I'm in Oxnard, ventura county and we drove to Beaumont RV. Only issue we had was our DVD player didn't not show picture just sound. After a few phone calls Beaumont RV switched ours out to a new unit upgraded unit too with bluetooth.
