Your car may be sitting on the bumpstops in the rear, thus causing it to be so high.
Alot of aftermarket suspension manufacturers will tell you to cut the bumpstops down some due to the drop.
Make sure to take a look.
If you took your car to be installed be a regular local shop, they didn't cut your bumpstops. I worked at a shop before, and we couldn't do no customizing.
Basically only Stock spec, or installing.
I believe to customize at a shop requires a different shop liciense.
I've seen Tokico struts come with new bumpstops, unlike these ****ty KYBs.