By the wear it looks like something was not right, hard to tell the exact problem without having eyes and hands on.

measure the inside drum diameter on the new rotor and the old rotor, to see if the new rotor is ismaller.

If looks good, adjust the parking brake mostly in so that can be ruled out, set the rotor back on and see how it fits, if good red adjust the parking brake, if that is ruled out have to look where it is hitting at.
by the marks it looks like the diameter is to small, but could have been wedged on by the parking brake.