Talondale,
I would not be too concerned about it. What you need to be concerned about is where they impact(left/right) compared to the fletched shafts. The fact that they are hitting a little low can probably be corrected with a nock adjustment.
Furthermore, if you are doing things correctly, you should see a difference(left/right) in impact locations between the 145 gr and 125 gr tips. Assuming you are right handed, the 145 gr tipped shafts should impact further right than the 125 gr tipped shafts.
Brett