I don't know if this is a bug, but I was experimenting with using analogue controls for switches, and when I map one to move view left and right, one end gives central head position (right behind your gunsight) and the other slides ones head fully to the right. Could not move my head to the left at all.
I would have thought intuitively that the middle position on the potentiometer would centre your head, and the full throws of the pot would move your noggin left and right?