So it actually copies the playlist not just clones it?

Neither. It simply makes another link to it.

Everything in Emplode is a link. Links to songs, links to playlists. Playlists contain some parameters and then a bunch of links.

Even the very first copy of something (song, playlist, whatever) is just a link to the actual file. So no one link is the "original" link, they're all just links to the file that contains the data (which never moves).

So when you make a copy of something, you're just making another link. So when the thing-you-linked changes, then it changes for all the links that point to it.

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Tony Fabris