To the user complaining about the headphone issue: not too many people use headphones to fall asleep, this app is designed for the non-headphone users!!!
And to the user who wishes to be able to delete song from playlist: how about using iTunes and create a playlist specifically for Dozzzer, songs that lull you to sleep?
Stop making things so complicated. This app works as intended and it works well.
FireIgnite about Dozzzer: Sleep Sounds, v2.0.8