Most of the time when I use sleep at end of song, the song is left as the queue'd track so that the next time the player is turned on, it starts from the beginning again. Generally, I use sleep at end of song because I am leaving the room (or sleeping) and I don't want to hear the song again on my next listening session. If the next song in the playlist could be active at the next power-on event, it would be preferable. Thanks.