Aftermarket Auto Shifters - What are U running ?

Mile high,
I had the same problem and it turned out it wasnt a matter of the bases centerline in relation to the steering wheel it was a matter of actually leveling the seat out. It being out of level side to side made it look like it was off center. I ended up needing a 1/4" shim on both attachment points, on both seats next to the driveshaft tunnel.
Hope this helps.
Andrew