Your post edited for brevity.
I believe this is exactly what TM ran into head on. IMO, CA seeks to make the world as she sees it, not see the world as it is. She sleeps at night because she feels COMPLETELY justified in everything she does. No distortion to outragous, no anger too extreme, even toward the man searching for her Grand daughter for not doing exactly as she thinks he should, at ALL times. She is someone who's entire life seems to be staked on being in control, which many come to realize at some point in life, truth is, control is only an illusion for us mere mortals.
IMO, CA realized early on Caylee was no more, (I believe KC admited so through JB, though likely still blamed it on someone else) and she made up her mind that she would do everything possible to protect KC. What she failed to realize was, this was the exact attitude that helped produce this tragedy in the first place.
IMO, she will throw anyone under the bus to get her way, and her "way" right now, is to protect KC at all cost. Even the cost of having her grand daughter lying in a field, picked at by the critters, because she feels justified. Even at the cost of trying to vilify the man who came to search for her lost grand daughter. IMO, she knows no bounds in trying to get her way.
I do not see KC as having a genetic disorder, but I'm thinking it was more of an enviroment thing. I can't imagine what it was like growing up as a child, with CA in control. This does not excuse KC, but merely seeks an answer to how could this happen. IMO, this was a battle for control, and poor little Caylee was the pawn.
Please pardon my speculations about this case.