Ghelleb, interesting you wrote that. I think my (and probably ramdas's) situation is exactly the same.

I think my left side cervical stabilization got shot due to whiplash and right side is overcompensating. Same as yours. Incredible, now I do have scoliosis at the thoracic and lumbar junctions.

Are there any exercises you do for this to strengthen the deep neck muscles without activating the superficial ones?

Anything you do for your right shoulder (Darn, same issue as mine), I presume some sort of stabilisation and serratus protocol?