I have to agree with you, Dot. According to phone records, etc, KC was talking to CA quite regularly during the month after she left home. If there was a big old fight before she left, then I think CA thought KC was cooling down & maybe getting her act together with Caylee. After a couple weeks, she misses Caylee and writes the Myspace post about her being missing, probably trying to guilt KC into coming home for the 4th without really begging her. I think CA really believed that KC was in Jacksonville with the nanny, etc. Then came the car impound notice. When they brought it home, yes they smelled the decomp. But, knowing they talked to KC quite often, they did not really assume it was a human death that occured in there. If you have smelled human decomp, you might recognize it but then wonder if an animal would smell like that too if it died in there in the heat and didn't get removed right away. In their anger at the car issue, I think they automatically cleaned it up--thinking maybe dead animal, removed clothes, etc. Maybe they were thinking they would sell the car and punish KC, knowing she would have to come home and try to get her wheels.
I think once KC was brought home and the Caylee hadn't been seen for a month story came out when she talked to LA, then all hell broke loose and
the car smell call to LE took place--the only time CA was truthful--she was frantic in fact. KC immediately jumped on the "who took her" question from CA and came up with the nanny. That's when CA began the cover up--for fear of something happening to Caylee. I don't know how long it took her to realize the truth but her mind would not accept death at that point.
As always, JMO.