looks like you could move the rear spreader bar up a bit. did you see if it fit better up-side-down from its present orientation? having to massage the notches a bit would be a standard thing and woulndt constitute a faulty product in this case. every cage is going to weld out a bit different due to the heat involved. dont tack it on if there is a big gap. ratchet straps will help line things up as well.
-insert meaningless out-of-place political diatribe-