I am pretty sure this is not right... IF the slideout moves when extended then weather can get in. I would take it to a Jayco dealer for adjustment, and see if the seller will pay for it or part of it.
2004 Chev Silverado Duramax optioned past the max. 2009 Jayco Eagle 308 RLS 765 watts of solar, 6-6 volt batteries (696 amp hour), 2000 watt (4000 surge) whole house inverter.
140 days boondocking in 2016
211/2015, 196/14, 247/13, 193/12