Originally Posted by
FBinNY
Of course, we don't know that it's the back end of the axle, but can reasonably surmise that as a possibility worth serious exploration.
A dropout alignment check with a proper tool would check alignment and the fit of a more conventional wheel in a minute. The conventional front wheel test would at least show how the axle was seating on the inside.
Just don't try to bend anything. By the way, taking a file to it would be the quickest way I know to void the warranty or make the frame unreturnable.