Really says it all. My bard, Syngg, on Cazic spent forever trying to find where this song was in her spellbook and so I checked /output missingspells to see if I just never bought it, but it didn't show up in the missingspells list at all. I asked my guildmates and they confirmed the category (Heals -> Cures) and it was definitely missing for me. I checked /output spellbook and the song wasn't listed there, either. So clearly there's a problem with it not appearing. I've since purchased (and scribed) the song into my songbook.