I think this is why its better to call it up travel then droop.
Basicly if you have to raise your ride hight up 1mm you will have 1mm less of up travel now so you need to loosen the droop screw to get back the same amount of up travel as before.
I can understand that after you set that up taking it and putting it on blocks to make sure left and right arms are at the same level at max travel so the car has no tweek to it.