Ok, this is the way that I see it, what am I seeing wrong? I see that if the deer is 70.7 yards away (LOS) at a 45 degree angle, the range finder would tell you (approx) the deer would be a horizontal distance of 50 yards.

If you aim at that deer at 50 yards (using an bow for this example) I see that arrow falling short if you are shooting at something (or at least very low) at 70+ yards away.

I am sure I am missing something simple in this, cause I just aint quite getting it [>:]