I had an issue with my rear springs not being exactly the same length.  I ended up moving one of the shackle hangers more forward than the other one to get the shackles at the same angle.  I wouldn't make any changes to them until you know they are broken in (couple trail runs and some time on the street).  You then can make changes to them if need be.

Thats the idea. Im planning on swapping them at most from side to side because when the truck was set up they were even so i may just have them on the wrong sides. I dont know what else it could be holding them up so the shackles dont swing back after i put it back on the ground.