You shoot at the same top point each time but as you dial your elevation turret up the bullets will hit progressively lower. As Frank said, each is 3.6" apart which is equal to 1 mil at 100 yards. If you dial all the way up to 10 mils you should go from hitting the top center square dot to the bottom center square.
As you dial your elevation turret up it is actually moving your aim position down. At distance that means you have to tilt the barrel up a bit higher which allows you to compensate for the bullets drop but since we are keeping it at 100 that means the barrel is actually getting pointed progressively lower as you dial up.
If your bullets hit where they are supposed to then you have a properly tracking scope. If they hit elsewhere you can measure and see just how skewed your scopes elevation travel is.
You could get a secure mount like the targetusa mount or make your own version of a scope humbler and then not have to shoot the target to see the results.
bold part is backwards, aiming point needs to be on bottom...if you aim at a point and shoot, then dial up 10 mil...its going to hit 10 mils higher