Left rear brake drum gets hot

Ok, so I got to looking at it, and found the parking brake mechanism works correctly. With the shoes off, it moves freely and the lever that is connected to the cable returns to it’s original position. Both rear wheels don’t turn when you hit the brakes. I went to go reinstall them and discovered that left rear drum has some serious taper right at the end. You can’t quite get the drum to set all the way on the hub. When you put the wheel on, and tighten the lug nuts, the drum wedges itself on. I swapped the drums around, and sure enough, now the right side gets really hot. So Ill get the drum resurfaced and let you guys know.