I would have put this in Tech Support.
Strange that it is mixing your songs and music together.
You have all your songs in one playlist? Well, go to your Media Player, click on 'Add' and then go down to New Playlist/New File, whichever it is on your computer. From there, you can choose what files you want to shift over.
Also, I think there is a choice to move individual files in order to the iPOD.
If you move them in order, it shouldn't mix with the music, and if you give them the same album name or something, then I think that it will be fixed as well.
To answer your original question, no. The playlists simply display the songs in the same group from the library, I believe.