I suspect auto aim is defaulted to on. I say this because I have gotten several head shots with the sniper rifle that should have been clear misses. This kind of stuff should have been caught by SQA or if it was caught it should have been marked must fix.
Yes but the crosshair was noticably away from the target's head maybe by as much as an eighth of an inch (OK so hurried my shot). It did seem more like an auto aim.
Were you aiming at one of those guys manning the turrets in the wasteland? Because you can throw a bullet anywhere near those guys and they'll go down.