I didn't know this until recently, but just like lowering a car and having to align it, if you constantly adjust the height on an adjustable coilover equipped car, you wouuld have to align the car every time you raise or lower it! That's very weird.....Makes you wonder..
Ed

 

i dont see why....when u lower or raise it the only thing that might get affected is the camber. the toe will not change unless you're taking the coilovers out just to adjust them. i've adjusted mine about 3 times and never re-alligned it and its been just fine.

 

And if you change camber, toe or any other components in the suspension, you would need an alignment..
Ed