Have you tried deep conditioning with oils or other moisturizers/proteins? Maybe you could give that a try.
And as for the poofyness in the back, girl I know how you feel. I have different curl patterns in random places on my head. I do twist-outs sometimes and they make my hair look great and even, instead of flat in some areas and poofy in others. I do them as soon as I get out of the shower with a little bit of coconut oil and any leave-in conditioner or cream and wait for them to dry (sometimes I leave them on overnight or for a day or two).