JP sent a text to AH telling her not to let KC and TL in his room while he was not at home. He did not like her there, probably because friends knew her to be a liar and JP might be a little more mature in deducting that she was a toxic person-Her other friends shrugged her behavior off, as noted by Annie, Iasson, even LA.
JP seems to do pretty well in life, from what I understand, and likely saw through her. He probably figured that if TL was into KC, something was wrong with him, too.
No mention of Caylee in JP's texts-AH told LE that JP was a peripheral figure because he could not stand KC and did not have much to do with her.
You are right, IIRC-Both JG and TL recalled the same first meeting, nothing weird about it unless one were to believe KC was trying to make JG jealous, which is not necessarily weird, just childish.
Only bad mark we have on RM comes from LA, that RM has a criminal record with drugs-RM also deleted things off of his computer after he was told not to. I don't believe those things would implicate him in the murder, I just think he didn't want his personal stuff published in doc dumps, as by then interviewees were realizing that is what would happen.