Robert,

 

It is a combination of what I have beens saying (you are too fixated on it) and what Daniel Meyer said (it is tight and over pronounced from being right handed and using that side a lot).  It could also be just plain ol' genetics as to how your shoulder girdles are developed and sit.  My right arm hangs lower than my left.  My right shoulder hangs lower and more forward than my right.  I know this is a combination of me being right handed and always using and carrying things on my right shoulder over the years as well as my genetics.  I have learned, as hard as it is, to ignore the mirror and I have been using dumbbells exclusively for chest and primarily for shoulders and traps and my physique has evened out.  I still "see" the imperfections as I wrote in my prior post but other people don't - so it is more in my mind than reality.  If you keep fixating yourself on your traps, your mind will as well and your brain will therefore cause the muscle to be more flexed in a relaxed state than your left side.

 

John