5'er Hitch installation "issues"

[JThiessen]

I just had my Husky Slider installed in the '03 2500 by Tims Welding & Toys for Trucks. They dont normally carry the Husky brand name, but informed me that they install them all the time.
They weld the brackets on instead of bolting, which I checked out, and per the TSB, welding is "ok" by certified welders.
When I hooked up to my 5'er (2001 27ft Jayco) I noticed right away that there was a significant difference in the distance from my rear bumper and the trailer, in that it was much closer than it was with my short box. I attributed this to the difference between short/long box, and that DC moved the rear axle back...
But this afternoon I finally tracked down installation sheets for the '03 and they state that the rear rail should be installed 28 1/2" from the back of the box, thus putting the pin right over the axle. I measured mine, and its 34 1/2. This puts the center of the pin about 5" in front of the axle centerline (instead of right over the axle)
Is this an issue? I know that you want to avoid having it behind the axle, but is it really a problem having it 5" in front? What I really would like to avoid is having them grind off the brackets (leaving crud behind) and having more holes in the bed.

Thoughts????

Another issue is that my trailer still sits with its nose up 3 degrees (I lifted it using the additional holes in the Jake plates), but I guess I'm going to have to do an axle flip also to get it level...