I know what you mean. I can't remember where I saw it. What they were saying was you get the sight set at 20 yrds and it's on out to 35. I can't atest to that but it worked for me!
I would say you need to shoot your bow at the 35 yard range. I shoot a pretty fast bow, 65 lb. draw, 100 grain tips, 350 arrows. If i used my 20 yard pin out to 35, i would probably miss every deer at 35. I actually have seperate pins for 0-20, 30 and 40 yards and a hand turn adjustment for yardage past that.