Did you count the leaves on the springs? Are they stock springs? A Challenger SE that I parted years ago had extra leaves installed on each side when I bought it. I've also been known to buy Super Stock springs for different cars and use all of the lower leaves on e-bodies to adjust ride height. Yours may have been "adjusted" by someone like me. Also my original Heavy Duty e-body springs had 6 on one side and 7 on the other. My new Heavy Duty Mopar Performance springs, each have the same number but the bottom ones face opposite directions.
Rob