Drum Brakes Sticking

If he did some damage i'll be sure to give him an ear full about it and possible get some free parts [that weren't needed probably]. We followed the pattern of the old shoes that came with the car and each side puts the Shoes that attach to the springs to the rear.

When i looked at the rear driver side brakes the ones facing towards the front had a area shaved off at the bottom end and looked like light grooves where the drum may have been warping and rubbing in on it?