My hair does this very same thing. How long is your hair? I've noticed it but I've always thought it was because my natural hair is still very short, about 5 inches long.
Now that you mention it though, I looked at the sole baby pic I have (where my hair isn't brushed to sheep-like status) and the roots are not defined. After an inch or two of something that isn't straight nor curly, it Os all the way down. I just took a pic, does yours look something like that?
Last relaxer: April 2, 2012 ... I'm Transitioning!
▪ Wiry texture ▪ SO pattern ▪ Sharpy-sized & pen-sized curls
▪ Coarse strands ▪ Normal porosity ▪ Normal elasticity ▪ High density
▪ Rhassoul clay
▪ Jane Carter Solutions Nutrient Replenishing Conditioner
▪ Komaza Care Califia Moisturizing Cream
▪ Yes to Carrots Shampoo