PSA: This is likely a user error here - I've been having way more trouble with timing in Melodyne than normal lately. I finally just noticed that my time grid in melodyne is out of sync with the grid in my Pro Tools session.
I'm definitely not an expert in melodyne but I've now learned that when there's no tempo listed in the window (next to where my screenshots above show A Minor), then doing any pocketing or timing edits that need a grid are extremely difficult :)
I have no clue if this is related to the faster-than-realtime import of audio from this script, or some other user error on my part. In testing, when I "transfered" the audio manually in melodyne, the grid syncs right up. So an easy fix if anyone else runs in to this after using Andrew's script is to manually transfer a small portion of the track in for melodyne to sync up to the session's tempo.
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