Definitely sounds over conditioned. Are you sure your hair texture is coarse? I only ask because I also have extremely thick hair (met FIA criteria for iii after a haircut where stylist thinned my hair), and as a brunette I could definitely see individual strands of hair when I held them in front of me, but I learned over time that my hair was fine in texture, I just have a lot of it. I ended up over conditioned and started adding protein a little at a time and was finding that my hair never seemed to get over-proteined, so I started questioning my assessment of my hair and did a hair analysis that came back as completely different than what I thought.

Modified CG since 11/5/11
CLEANSE: VO5 Vanilla Mint Tea Clarifying, DevaCare No-Poo, CHS Treatment Shampoo
RO: DevaCare One Condition, SS Caitlin's Conditioner, Mop Top Daily Conditioner
LI: SS Repairing Protein Treatment, CHS Silk Leave-In
STYLE: Re:Coil, Curl Keeper, Deva Ultra Defining Gel, Curls Rock Amplifier and Strong Hold Mousse, Sweet Curls Elixirs Okra Gel and Hard Hold Gel, SS Curl Enhancing Jelly and Firm Hold Gel