60 visits is just plain ridiculous - are you in the US and therefore your medical insurance is being ripped-off for this?
A lateral shift in the cervical area of the spine is very common - the shift of a vertibrae posterior will cause a shift to the side. Over time the muscles will hold that imbalance in place, hence the muscle tightness.
Adjustment of this sublaxation (shift) is a 30-second manouvre for a trained practitioner. It will have to be checked regularly and re-adjusted until the muscles hold the correct position. Regular warm neck wraps (those herbal cloth wraps that you pop in the microwave to heat up) will help relax the muscles more. If you can get hold of it, a muscle heat balm called "Tiger Balm" is ideal, though best to select the White version rather than the Red.
Was there any rotational scoloisis of the lumber region? Often if the neck is set to one side, the hips are out of alignment to the other side.
Avoid actions that worsen stress on your neck, such as sitting too far from the computer screen and subconciously jutting your head forward. Also consider an Orthopeadic pillow as they can help a great deal.