[Monkey Wrench]

I think the problem is that the brake is being pulled to hard or is adjusted a bit too loose..
some cars used rear drums for the ebrake, I think the porsche used separate brake shoes just for the E brake, volvo did too. at least in cars of the same era. I guess it wasn't easy to design a system that used hydraulic pressure to hold disk pads on.

Ive been driving a vehicle with an automatic so it has "park", I don't know why it was built with such silly duplication ;-) these unnecessary luxury "features" !

I do find it handy when the brakes start scraping, then I can just use the E-brake to bide a week or two to get new pads in without rotor damage ;-)