Thanks Chiquita, for bringing up the transcript of the second 911 call. It reminded me that one of the things I heard CA say for the first time was that she had told Casey to return the car two weeks earlier than it was impounded (she describes it as "stolen" on the 30th, which means that two weeks earlier would have been roughly the 15th).
This is in direct opposition to her statements that she made where she implies she was unconcerned because she knew KC was off "bonding" with Caylee and that she didn't need to know where she was, trusted her daughter, etc.
It also suggests that KC left home in such a way that it made her parents very upset. If she had simply walked out of the house as GA describes, on her way to "work" and the "nanny's", then why would her parents think she had "stolen" the car? It implies that when she came home on June 14th (after being gone most of that week at RM's etc), her mother had perhaps ordered her to stay and keep Caylee at home. After the trip to Mt. Dora on Father's Day, that clearly did not happen, as they were never seen together again after the next day.
CA telling LDB that she had told KC to return the car two weeks before it was impounded is in complete contradiction to her subsequent stories she told LE and the FBI and the press about why KC had left home and in which she minimizes its significance or meaning.
In order for CA to have assumed that the car was taken without permission, she is almost admitting that KC left after an argument or fight of some kind on the night of the 15th.