Check the ends that are welded to the trans cross member. I have the exact same problem on Pam's Jamaican Blue Baby and I found that the previous owner had repaired a rusty cross member with a safe-T-cap kit. In doing so he unknowingly clocked the right side torsion bar anchor 1/6th of a turn. I didn't notice till I was cleaning up the bottom of the car. It has always been that way and even though we have to turn one adjuster in further than the other there was no issues with the ride or having to much tension on one side.
I don't think it matters how much you turn them as long as the car sits level. I also don't think that having one screw in more than the other means that one tb is cranked up more than the other. I am going to try to remove the bar and loosen the LCA's and do it again just to see if I get a better setting.
I don't know everything there is to know about this set up so if there is something I'm missing please......more info.