I'm sure this is a rookie question but I need to ask it. I have the Vortex Viper PST. I have my rifle sighted in and I have the turrets set to zero. That's my question - should I have my elevation turret set at zero, or should that be set at one? I zero'd in at 100 yards, so should my turret be set at one so when I dial up I'm moving up from 1 to 2 (100 to 200 yards)? So when two is on my dial I am now at 200 yards, and so on? It just seems strange to dial from zero to one and be at 200 yards, or have I just confused myself?