Nah, they're the same. Except mine is a lot dirtier (with over 15,000 miles on it), and you've got your shaft reversed to get more height. And a bit more tilt. But neither of those should be causing problems.
The extra small holes are for mounting the little balls used by friction sway bars. Not too good a solution for sway I've heard, and definitely not necessary for your rig.
And yes, the same receiver is used with different size spring bars. I guess we both have the 800# ones.
Good luck. Good idea to get your buddy over. Sometimes it just takes a different set of eyes and hands to work things out.
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