I must be missing something. It seems to me that "Play Next" and "Add to Up Next" do the same thing. Let's say i decide to listen to an album (yes I'm old and still listen to entire albums) and as I'm listening I decide what album I'd like to hear after the current one is finished. If I select "Add to Up Next" it plays it right after the current song is over, if I select "Play Next" I get the exact same behavior. It appears there is no "add to queue" functionality like most other music playing apps and services. Am I in fact missing something or is this a ridiculous omission on Apple's part?