i don't know how i did it but i need help to fix it

[The_BullDog]

I have a 77 C10 with a 12 bolt rear end. i got a djm 5in flip and some 3in drop spindles. My truck was level when i started. i pulled off my leaf springs it is a stock 4 leaf but the PO took off the bottom small leaf. So i was sitting level with 3 leafs. took the leafs and shackles off sanded them painted them and put new bushings in. i re-install everything the way it was befor. I put the flip kit brackets above the leaft so the bolt fit in the offcentered hole with the holes towards the cab.i placed the rear end into the brackets and put the U bolts back on.

here's the problem.

using my stock spring plates i don't have enought clearance to put the shock extender on the mounting bracket. (i was sent the wrong shocks anyways but still i need shocks on the truck.
with the stock spring plate on and no shocks on my pass side is sitting a good 1 to 1.5 inches lower then the driver side.

what did i do wrong? how can i fix this? why is it so hard to just flip a rear end.

i have done flips befor and never had a problem.