Hi,
It is unbelieveable that I have found someone who shares my affliction. Everything you have described, I have endured, and I felt like I was the only one. I don't have health insurance, so I haven't had the option to seek medical opinions. I have tried everything to build my right pectorals, but as you have said, the other compensatory muscle groups have indeed grown larger than their left-sided counterparts. It is incredibly frustrating and I have given up weightlifting as a result. I hope you have found some resolution or better answers. If so, I would love to hear what has become of your search for a more thorough understanding of this issue. Thanks and take care.