cpp lowering spring issues

[Blue18]

I've got a 1970 c15. I bought the 2 inch CPP lowering spindle and 2 inch lowering spring. I replaced the upper bump stops with low profile energy poly style which are about 3/8 of an inch wide. I installed everything and it seems the spring is a little loose in the pocket. has anyone had these issues? im sure if I put the factory bump stop I could get the spring to not move in the pocket. is this a design flaw in the spring or just my fault for using wrong bump stops? does anyone have a solution for a 2 inch drop but a spring with more freestanding height? CPP is no longer going to be used on ANY of my trucks it seems QC is lacking and cheap parts is all they use. sorry for bashing but these parts seem overpriced for what you get.