not odd at all, believe most trajectories that are published, or if you calculate.....peak around 75yds....so ya if you were aiming 0 at 100yds, at 50yds you're about hte same impact, 75yds high, 100, dead on, 125 low, 150 low...

its just physics my friend, but certainly good to know, don't want to be aiming high or low when you should be doing the exact opposite.