uneven rear ride height plz help
 

My fd was in a minor wreck, hit a curb and had to replace a rear wheel from oversteer about 5 years ago. Ended up needing a wheel beering, and the shop that did the work said the subframe was bent but they could easily bend it back and align the car.

Car has sat fine until installing tein lowering springs onto my koni yellows. With all rubber pieces and bolts and perch settings being the same, the unnoticably passeneger wrecked side sits 1/4 to 1/2 inch higher than the driver side. REAR

Someone plz tell me, is this just a natural variation on the springs/geometry thats more pronounced with lowering the car or is this a result of bent subframe. I dont see any unusual or bent pieces under the car.