Almost lost a wheel

It should be noted the other three wheels/adapters are still as snug as when installed.
How long have you been running without the outer bearing dust cap?
Even the factory spec for the 1/2" studs was 65 ft-lbs, so 70 would be an over torque for either one
5 lbs over the factory torque spec ain't jack.....and a wheel center that's moved out 1" does put more loading on all the front suspension parts.