MK2 Belt moves outward off rear pulley

Thanks a lot for helping me out with the pictures, I think the previous owner and his wife didn’t ride them much because of that problem I was having at first with the flange coming off the pulley and the belt moving off the pulley and stopping the bike, The epoxy is holding so far, if it comes off I’ll see if a pro can weld it on there permabantly, thanks again for the help