I'm also having some odd goings on when I edit songs.
If my edit consists of adding a line, then nothing happens to the song in the schedule when I edit the song in the database - not unexpected, but EW2009 gave you the option to update the song in the schedule, EW6 appears not to.
When I then add the new version of the song to the schedule, I get it in twice, both songs being the new version! When I then display that song, I get the old version and then about 1 second later the new version comes up!
However, when I edit a song by adding an image or background, I still get two copies when I add the edited version to the schedule but in this case the old version is unchanged and the new one added so I have the choice of using either old or new.
I would be grateful if we can have an explanation of what is intended to happen - please!