You probably got lucky and bought the correct size shoe the first time. I had mine all apart and found out the hard way that there are two different sizes. Of course I had the wrong size, and had to take an Uber to the parts store to get correct one.
When I took my rotors off to replace them the pads fell of the e-brake assembly literally from corrosion and rust. In their defense I bought the car with 169k on it. That’s why I replaced mine. I never use them, I rarely park on hills and just turn the wheel toward the curb when I park if I do.