I changed the ride height a little on my car a few weeks ago and when I put it back on it's wheels, it wasn't sitting right (not to that degree, but still not right).
I was sure, the car was level before I changed the height and both were adjusted the same so the only possible failure was me
. The spring must not have been sitting right as when I lifted the car back up then removed and re-fitted the springs and it was fine.
It may be worth taking them off, setting them both to the same height, measuring the height of the spring+adjuster off the car without any weight on them, then re-fit them.
If you still have the same problem, swap the springs over and see if the problem occurs on the other side.
Obvious things to try I know, but my guess would be that the spring isn't sitting correctly.