Hate to bump an old thread but I am experiencing something similar ever since I lowered the car on HKS springs and added 275 tires front and 305 rear. Very unnerving having the car shift to the other lane under hard acceleration. Even after the alignment it still feels unstable.
Not an idiot, I was confused as well during my install. Fortunately I was able to get a hold of Marshall from Visconti (on a Sunday afternoon I might add) and he was able to set me straight.