Remember that playlist are created from the content of the B2's "b2db" file. The "b2db" file is the output of the B2's "Main Menu > Settings > Scan Disk" Function. Therefore before creating a playlist ensure that the "b2db" file is up to date by
running this function.
Also be aware that if you edit or delete music the changes while reflected by a "Scan Disk" in the "b2db", these changes will NOT propagate into any playlists generated earlier. The playlist may become out of date and cease to function properly.
Therefore generate your playlists AFTER you have finally sorted out your B2's music holdings.
Fred