It is what it is. Mine is the same way due to the rudimentary slide out mechanism. Watch the slide move the next time you deploy it...the thing wiggles and wobbles the whole way until the top edge contacts the hole in the side of the trailer. Nothing to worry about.
2006 23B Hybrid with 10k round bar WDH
2011 F150 4x4 SCREW Ecoboost, Max Tow, Integrated TBC, 3.73 LS axle, Firestone Ride Rite airbags.