If you create them properly in Emplode, they are separate entities and all is well.

If you try to copy one of the playlists, for example, if you copy the "alternative" playlist from one place to another, then they will be the same playlist (edits to one will appear on the other).

If you want them to be different, create the playlists individually. If you want them to be the same, copy them.

More details on how duplicates are handled are in the FAQ, here.