No dude. They are not or something is fucked. NEVER have I heard any stories of LOWERING springs increasing ride height by 3". Thats fucking ridiculous.
Those are the wrong springs. Understang that 6cyl springs are very different then 4cyl springs. If you put 6cyl springs in a 4cyl car you will get the exact effect you are experiencing.
3 blind,1 legged, monkies with hiv couldnt screw up a spring design to the point where it lifts the car 3". No way.