I don't think Meehan did Jennifer wrong on the stand.
I took "down" to be a contrast to "excited" on the stand. I think that's how it sounded to the jury.
He took the notes contemporaneously, it appears, so I imagine that Fotis and Michelle called trying to be the saddened victims. Fotis held it mostly, like in his 48 hours interview. Michelle lost it a bit, letting her anger slip in. I imagine if Fotis discussed this at all with Jennifer, he portrayed Meehan as taking a side, even if he wasn't. I have no idea about the extent with which Meehan was taking a side in 2019, he if was taking one at all. But I don't think he appeared partisan at all on the stand.
MOO