Did my Andersen No-Sway WDH do this???

It is really difficult to determine exactly what the cause is. It does appear as if the plate itself is sitting very close to frame. It also appears that there are rub marks on plate from frame however those marks appear to be fairly recent. From looking at frame it is definitely indented and the weld is torn. So much for the obvious. If I had to put it all together I would guess that the frame was struck at some point hard enough to dent and cause enough of a downward bend thereby causing it to rub against the plate. The tearing of the weld is a result of that rubbing. In any case I would suggest contacting Anderson to see if there is some way to get more clearance.