I have been one of the ones saying Misti's story doesn't hold water from the beginning. I think those doors were opened by someone that knew the house, someone who couldn't hold the door open and carry Haleigh. I am beginning to feel very strongly that this is yet another family/caregiver kills the kid for someone unknown reason and that the door was not propped open to stage an abduction.
Misti clearly seemed to spring the news on Ron at the moment she absolutely no longer had a choice. She may have been doing clean up and damage control right up until Ron was coming down the street. Never had a chance to close the door or think the story out. The story doesn't make sense with the layout of the house, the timing, the clothes, and the details are a never ending moving target. That can only point in one direction for me after a month.