OK I have an iPhone 4 unlocked/jailbroken on 4.1 I have all my music on their and like to have one playlist for just party music. This has happend about 5 times already, but I will create the playlist and add my songs. But then when I plug my iPhone into the computer and add a song to the iPhone on iTunes it deletes my playlist? I then create a new playlist (with a different name) and after only adding one more song the entire playlist gets deleted. Also I have my music set to manually manage.. Anyone got an idea??