Ah, wheel slop… never heard that one before. But that’s one of the problems, yes. Put handbrake on, release footbrake, car moves a little then (just about) stops.
The other problem is that it doesn't actually hold the car on a hill. I mean, maybe if I wrenched the handle up another couple of notches it might, but other cars I drive (like my parents’ Siesta) hold completely on 1-2 notches, with little pull needed on the handle