Originally posted by B18CBungy
Condition of the shocks do not affect ride height at all. Doublecheck the model numbers on both your shocks and springs to make sure they're correct. Usually, on lowering springs, the fronts are linear rate and the rears are progressive(much softer than the front as to not significantly alter ride quality). As others have already said, it's most likely you accidently put the fronts on the rear and vice versa.
The condition of a shock does affect ride height. Blown shocks make your car sag. Cadillacs are a testament to that. Usually most lowering springs are either linear or progressive, they wouldn't make the front set different from the rear. If so, what springs are linear in the front and progressive in the rear?