Right now I have on a single that does not move. If I sight with the dashes won’t I be changing the anchor point?

Yes, but that doesn’t matter. Remember a anchor point is only a Eye position and the AS will allow you to range change by changing your eye position and viewing that change in the AS… You range change with a rifle when taking a full bead vs. fine bead by changing your eye position, this is done with a slight upward tilt of the head. The Anchor Sight works the same way. You will be able to easily range out to 40 yards with just a slight tilt up of your head leaving your anchor point in place..