IMO, I don't think a psychologist would have advised Cindy to seek custody of Caylee without a fairly detailed list of situations in which Caylee had been endangered by Casey's actions or in-actions. Counselors just don't advise that a parent lose custody of their child without substantial proof of child endangerment.
Based on this, I would agree that Casey wasn't on her best behavior around her family. I think she would try to impress her friends, and especially her male friends, with how good a mother she was, which is why we're not hearing anything from her friends about any abuse.
If the report of an encounter with JT on June 9th at his computer shop is correct, Casey may have felt that a stranger, a clerk, wasn't someone she had to impress. Likewise, JT seeing her at Walmart on June 16th, if true, was how Casey may have acted on a routine basis around strangers.
I'm reminded of a report very early in the case when Yuri stated that a hairdresser reported that she had seen Caylee with bruises and described a bruise under one eye. He said that he also had a photo from a cell phone that showed Caylee with a bruise under one eye.