I still dont know!
I had always assumed that the flurry of calls was when something happened to caylee, but that would indicate an accident, and her 'reaching out' for help.
I've been wondering if the 'flurry' was actually KC trying to get in contact with her mom and dad to see if they could watch Caylee that night so that her and TonE could have a quiet movie night together.
She had just spoken to TonE before the flurry of calls, and she speaks to him in between the calls to her mom and dad, and is speaking to him around the time she leaves that ping area for the first time that day.
George says that when she left that morning she had already told him they would be staying at Zannys that night. I guess its possible that after that, she called to say Zanny was abducted by aliens or something, and so she needed them to watch Caylee that night afterall.
But, on closer look at the cell records, it could be that KC called GA, who said to call and check with mom. She cant get through to CA, so calls GA again who says the same thing.Since its getting close to the time that she needs to meet TonE, she figures that if her mom gets home around 6ish, she only needs to find somewhere to put caylee for like an hour, hour and a half.
She uses the 'narcotic nanny' and puts her beautiful little girl in the trunk of her car, while she goes to hang with her man. She calls her moms cell at 6.31 & 6:32 and then calls the A home at 7:06pm.
Maybe she decides she doesnt want to leave her man to take Caylee to the A house, and tells her folks not to worry bout looking after caylee, since Zanny has been returned by the aliens now....or maybe they say they cant look after caylee.
She goes to the car to make sure there was enough CH to keep Caylee knocked out for the night, and maybe finds that she is already dead, or adds more CH to the rag that is taped around her face, and then heads out to BB with TonE, leaving her child to die.
This theory is supported by alot of the evidence we have seen (decomp, staining, chloroform in trunk, cell records etc).
This is me just thinking out loud because Im still not certain about the circumstances of caylees death, but its a possibility I've been considering recently.