Lowering problems?

Remember that lowering the car from the stock ride height changes a bunch of things.
By cranking down the preload on the bars they are a whole bunch softer.
All the bushings are now in a constant bind as they were torqued down at normal ride height.
The caster and camber are now out of whack due to the lowered ride height. Your camber goes negative as the suspension goes up and positive as it drops. Just jack the front end up and you will see what I mean.
The toe is also out due to bump steer.

Look at any ricer that has lowered his car and you will see that he has a bunch of negative camber and the car is real twitchy.
Lifting a car or truck is just the opposite.
It is a science.