<snipped> I think Caylee went to the nursing home on the 15th (a Sunday), Casey and Caylee did stay overnight with the GPs that night (don't think they had moved out yet), and did see the George the next morning/early afternoon. Then, something happened to Caylee. Don't know what, but I do not believe it was premidated murder - I think it was an accident. Maybe she went back to the house after George left (I bet she did that alot - pretended to go to work, then came back after the parents had left) and Caylee drowned in the pool... but really don't know. This was when Casey "moved out in a hurry" - went on a minivacation, got a job, whatever line she came up with to placate her parents.
She came back on the 24th to pick up some stuff - George suspected her for stealing the gas and made up the story about the tires so he could look in the trunk and found the cans. Didn't want to admit that at first in the investigation because he knew it could be damning for Casey, but then decided he better tell the truth about that one as it might come out anyway. Not sure where Caylee was at that point, but possibly already disposed of - or temporarily disposed of, anyway...?
So, Casey leaves the house again (probably in a hurry because George is pissed at her about the gas), and that is the last time they see her until July 15th (which is 3 weeks later - quite awhile!) In the meantime, Casey has abandoned the car and the rest we know...
JMHO, and I am probably way off base, but I just have trouble believing Cindy and George participated in Caylee's dissapearance. Quite possibly in on the coverup now, though - I think they are feeling guilty about calling 911 on Casey at this point.