Go to www.playlist.com and log into your accout (top right corner). Then click on "My Playlists" at the top. Then click on "Manage music on a playlist" from the Quick Links on the right side of your screen. It will then show you a list of all your playlist. Click on which one you want to rearrange. That shows all the songs on your playlist, and you can drag & drop them there, or click on the "X" to delete the song from your list (like, if it's a broken link).
After I typed all that out, I hope it makes sense! :-)
at 1:32 PM on Aug. 27, 2009