Why is this playlist showing up on my iPod?

I just got one of the new iPod Nano’s. I’ve synced two of my many playlists to the Nano – let’s call them Pop and Classical. One of the playlists I am NOT syncing is called Backup. It is a list of songs I need to backup to disc. However this playlist is showing up on the Nano even though it is not selected to be. Also, the entire Backup playlist isn’t showing on the Nano; just the songs that are in Pop and Classical and are common to Backup! Is this a “feature”? Is there any way around it?