Yep, the Curt hitch does that. Here's mine all bent/sagging:
Untitled by
tk_1971, on Flickr
Here it is after my buddy and I pulled up on the rack to straighten it out:
Untitled by
tk_1971, on Flickr
There's a post somewhere in the middle that chronicled my experience with the Curt Hitch. The very first person here (Bro1999) with a hitch also didn't install it and ending up buying another hitch with a better design.
The fix? Simple, I bought the Drawtite hitch and have been happily using it since without any issues.
Bottom line is that the Curt hitch goes under the rear bumper support beams bolts. The problem with that is that's all on one vertical plane. The Drawtite hitch has additional supports counteracting the leverage movement of the hitch as weight is put on.
Untitled by
tk_1971, on Flickr
So, I'm going to ask... the Torklift Central hitch is also of the same design as the Curt (single plane of attachment). How's that holding up? Anyone experienced any bending?