RE: Call me officially perplexed
I had the same problem when I first went to the WB. Paper tuned, then set the 20 pin right on. But my arrow impact moved further left the further back I moved. So I just tweaked the rest until my arrows were hitting the same vertical line each time and then adjusted the sight accordingly.
Center shot on the WB seems to be about 1/8" or so off of where I had my NAP QT 3000 set up for some reason. But it's shooting great and grouping well with both field points and broadheads so I'll not question it.