hey, im noticing alot of understeer in my car when i go around a turn at 50+ and i put d2 racing coilovers on, and im not sure if this is normal or whatever

but also when i finished putting them on, my dad got a mechanic to align it and he raised it a half inch so everything would be even. and i have no idea how much it matters or not but the company i got them from said to adjust them from the bottom not right under the spring and im not sure how the mechanic did it and wether it would cause more understeer or not

help please....

thanks