One lat bigger the other?

Ok guys I'm sure some of you may have had or heard of this issue before and possibly with other body parts. My left lat isn't as wide as my right. So for a while I started to focus on squeezing my left lat more. After that I also started to see a chiropractor and asked him about the issue. He cracked me for about 2 months until I left for Afghanistan, which is where I am for the next 7 months. Any thoughts as to this issue? I plan on hitting my 3rd cycle when I fet back to the states in preparation for the emerald cup in 2014. Any thoughts?