As I understand it (and Dick will correct me I am sure if I am wrong) the harvested items will eventually make it into the DT - but it may take a while.

also - the Harvesting team only started adding the marks about two years ago - so on older posts if you don't see them it doesn't necessarily mean they weren't harvested. Thirdly - if there is a "Third wing" = ^^^ it means the lyrics are already either in the DT or previously posted.