I'm bumping this because my mother has the same problem. (I think she's 2b/2c.) I styled her hair for her when we went to a family event just yesterday. I used a super hard hold gel and got it to look curly on top, wavy in the middle but then there was this straight underlayer. It didn't look bad but it just didn't match the other parts of her hair. Mousse doesn't seem to help with that underlayer either so I wonder what I'm doing wrong or how I can get that area to curl for her.
3A - C, HP, ME, HD. (Coarse, High Porosity, Medium Elasticity, High Density.)

CG since Nov. 2012

Poos: SM Moisture Retention + Yucca Baobab, TJ's Tea Tree Tingle
Condish: TJ 'sTea Tree Tingle*, SM Moisture Retention* + Curl & Shine + Yucca Baobab, Yes to Blueberries
Stylers: KCKT*, SM Curl Enhancing Smoothie* + Curl & Style Milk*, KCCC*, FSG*, CJ Pattern Pusha, Curl Keeper
Sealers: Jojoba* or Grapeseed* oil

* = HG