Fifth wheel frame structure flex question

Noticed on our fiver (pictured in the link in my sig) that when hitched and sitting on the truck with legs up.

The curbside front under the bedroom is bending up slightly.
I had noticed earlier that the screw cover trim needed resealing and did re-caulk.
Did the caulking when the trailer was sitting on the landing gear.

When sitting on the truck however the trim doesn't flex with the trailer. A gap between the screw cover trim piece and the caulking appears when hitched.

I pulled the screw cover down and found several trim cover screws not seated so they were tightened. I was sure that would be the fix, yet it just helped some and didn't alleviate the problem.

I'm hoping there isn't a serious frame issue under the front cover.
I notice also now the bathroom door inside won't stay shut when the weight is on the hitch.
By stay shut I mean the door knob latch is misaligned the door does close it just won't stay shut.

The trailer is under warranty.
I was hoping this may be somewhat easy to take care of myself.

Any help is always appreciated from the board.