That sounds abit like what happend to our V-Lite except our wall did not move around but it was seperated from the ceiling. While in Goshen at the FROG rally, the Rockwood/Flagstaff head service guy looked at it and said it happens because of walking on the roof. They took all the trim off and put shims between the top of the wall and the ceiling and refastened the wall up through the shims and reinstalled the trim pieces. I have been on the roof 4 or 5 times since and have not seen it happen again. The guy said when fixed this way it should not happen again but we will see over time.
John & Deb
2011 F250 Lariat FX4 Crew Cab 6.2
2011 Flagstaff V-Lite 30WRLS
Days Camped 2013: 16 2014: 5 2015: 3