Brookstone 5th wheel

[mwieling]

Just purchased a 2014 Brookstone 334RE. While doing the walk through at the dealership I noticed that the slide out that contain the stove and couch looked like it sagged in the center at the ceiling. I pointed this out to the person walking us through the inspection and he said it was the trim. I specifically asked if it could be a structural issue and he replied oh no it's just the trim that makes it look that way. We arrived at our camping destination got the trailer all set up and decided to wash it. While washing it I noticed that the top rubber seal on the slide out was more compressed in the corners than the middle. Upon going back inside the trailer and measuring from ceiling to floor I noted a 3/4 inch difference measuring from the corners compared to the center. I also measured from the bottom of the kitchen cabinet near the exterior wall to the floor and from the bottom of the front of the same cabinet to the floor and note a difference of 5/8 inch. Anyone else have this issue?