Fancy seeing you here fordubishi, I'm literally on your thread right now looking at those same things. It looks like you don't have little brackets on your wheel tubs to the top of the bed side either.
The cabbend panel of the tray on mine isn't rolled like the bed floor either, it's folded in and framed at the edges.

Looks like all the panels are the same, we just have them made a bit lazier.