I unsatisfied at the playlist making on the music app, on the WP8. I don't have a music pass to use Xbox music. So far I've been using extreme music to make play lists, and voice commands.
So the duplicate isht is a OS problem? i have one or two albums dupli or triplicated.
And yes i need playlist creation, right now i have like 5 list with the same songs except i added a new album or a few songs in the latest version of it. :/ it's annoying.