Is it possible that your hair does not like protein? The Suave coconut conditioner has protein in it and also the Devacurl poo has protein- just a thought. Before you buy anything else expensive, try one of the other Suave conditioners, the ones that say 2x more moisture, the coconut one is the only one that contains protein; the others do not from what I have seen so far.
sulfate, silicone and protein free since 6/11
porosity - normal to low
elasticity - normal

love my curls
My own butter mixture
My own version of Terressentials mud wash