How do I use the same song in multiple play lists?

I have the rev2 player; latest firmware.

I can’t figure out how to have the same song appear in more than one playlist. 

Adding a song that’s already on a playlist to a new playlist removes it from the original playlist.

Any help is greatly appreciated.

Thanks,

JC

bump

You need to post a little more info for someone to be able to help you.  For example, how are you creating the playlists?  How are you transferring them to the player?