Stacking double top or topI understand that stacking leveling kits is bad. And by that I am guessing you mean putting two on top of each other?
These are two different type of leveling kits. a spacer that goes on top of the strut and a spacer that goes on the bottom of the strut.
Is it bad to have one of each?
These two leveling kits will not be touching.
longer control arms also change the ratio .Wrong. Unless my .5" on top is actually .25" which is possible. I didn't measure it.