During the first CMC build I did I knew nothing about the weird off-centeredness of the CMC body so mine, too, is slightly skewed about the same as yours (but I can't remember to which side).
When I built the second one I had several years of this forum under my keyboard with people complaining about how their CMC was off to one side, so I made sure that I could get that body absolutely centered over the centerline of the pan. It was easier to do than I expected, but cannot easily be changed once the body and pan are together, especially if, like me, other builders glue the body to the pan with Silicon caulk to prevent leaks and then bolt it all down. If you know they're off ahead of time, you can compensate during the build.
As far as whose original body got used for the molds, I had heard that the original CMC/Fiberfab molds were bought from Intermeccanica, so if Henry comes to Carlisle with us this Spring, maybe, for the cost of a beer, you could ask him.