Front Suspension Bottomed Out

You don't even need to roll the car just turn the wheels lock to lock in both directions and the tires will scrub back to their static position.

If continual cranking of the adjuster always winds up with the control arm on the stops something is giving that shouldn't. The most likely candidate is the rear torsion bar mounts. Another posibility is stripped threads in the adjuster bolts. Unload the car and there is enough bite to allow you to crank them but put the weight on them and they slip back.

Looks like I was typing when you posted, glad you found the issue. I had a broken weld once. Didn't change the ride height but the car wouldn't hold the camber adjustment and it banged as the suspesnion loaded and unloaded.