There's such a thing as being willfully blind to the warning signals. (Don't wanna know.)
Right your are, Themis.
CA did not want to know. The A's was dealing with their own problems, i.e., financial ruin, nutjobs for children (LA & KC) and a very unstable marriage, at best.
CA, IMO, WANTED KC to be the "perfect mother," for in her (CA's) world the
facade is what matters most, and THAT continues even now!
She refused to babysit on occasion and when she did babysit, would call KC to tell her "it's time to come home." She, I believe, wanted "to teach KC a lesson" by attempting to force her to be responsible (knowing it was NEVER going to happen), therefore, only going "so far" regarding the hands-on, day to day care of Caylee - all at Caylee's expense ........ no one suffered but Caylee.
Stubborn, controlling CA, in the quiet of night, now, surely must play this over and over in her mind and she will forever have to live with the consequences of her inactions!
I don't think CA wanted the responsibility of rearing another child, and, therefore, took KC at her word re: "the nanny," the job and all KC's other lies. It was just easier for CA to turn a blind eye to what she really knew was the behavior of a very unstable, unfeeling daughter.
Yes, CA bought all the "right" things for Caylee ....... loads of toys, clothes, prepared and decorated a beautiful room for her, but I just believe deep down, she wasn't THAT committed to her granddaughter and her well-being. She had way too much other baggage/garbage to deal with daily.
Otherwise, she, knowing KC's sociopath personality, would have been MUCH more involved, aware of everything relating to Caylee. However, she wasn't, couldn't be bothered, 'cause she had too much of her own s*!t to deal with ........ poor Baby Caylee - never had a chance in that household.