questions about media library / playlist

[Kibou]

1. How do I save the order of the items in my playlists?
When I arrange them by hand and just close BSplayer, they´re all mixed up again the next time I open it.

2. How do I use the media library to make different playlists?
When I tried to find out by myself I just added a folder with movies, created a playlist, marked all and chose "send to playlist" - that worked fine so far. But then I added another folder, with movies I wanted to be on another playlist, and they got all mixed up with the old movies. But when I delete the old movies before adding the new ones, they get deleted from the playlist, too.