Sounds like IAGirl's pt on top of your protein rich daily condish tipped your hair over into protein overload. A good dose of protein perks curls up if you're overconditioned, but too much protein can pull the curl out, in addition to leaving hair dry, straw-like, and crunchy. Check out the first pic here. It's a good illustration of overproteined hair.
CG since 11/2011
2c /3a F /Mii, low porosity

Fall Products /Routine:
Clarifying: Herbal Essences Tealightfully Clean
Low Poo: Renpure Luxurious Argan Oil
CO: Suave Naturals Tropical Coconut or Daily Clarifying, V05 Strawberry or Kiwi Lime
Tresemme Perfectly (un)Done, Cure Care, V05 Kiwi Lime Squeeze, V05 Strawberry, Renpure Brazilian Keratin (old formula),
PT: IAGirl's as needed