Camco sewer lugs out of spec? An easy fix but very odd

one of my trailer rims had the China QC failure. there is a "hubcap" covering the nuts designed with a tab to slip in a slot and directly opposite that a small bolt holding it in place. the problem, the slot was off one position and I had to just fasten the bolt to hold it on and the tab/flange just rested on the rim, not in the slot. I have to believe that there must have been hundreds of similarly cast rims out there that folks should have complained about.
bumpy