Paul, everything moving in parallel is important. The lower and upper can be aligned. There are several things to make this happen, spacers, heims and ball joints. Look, sometimes when you look down on the upper and lower they may not be exactly in line with each other because of the caster. They can still be at ther same angle or running parallel with each other. I know it seems confusing and its nearly impossible to do this online. You are on the right track, do not give up. It is important as it effects how the car rotates.
