Nice. Get yourself a BedRug Mat and cut out holes for your rails. Stuff like lumber will slide right over the rails without catching and it makes the bed easy on your knees.
It looks like your hitch is adjusted high. In an effort to level your trailer more, you might try lowering the hitch adjustments and reducing your bedrail clearance. This is what I do with my Trailer Saver and I have had no problems towing 99.9% of the time with less than 6". If I need more clearance, I pump the hitch up with some more air; real easy and a no cost fix.