I was wondering, if you guys could answer a few questions for me as I am building a playlist and keep messing it up.

1. How do I save the file order of my playlist? Meaning, once they are added in, they won't become disorganized if I push any of the column buttons.  

2. Is there an easier way to filter out duplicates from a playlist?

3. What does the paperclip mean in a playlist?

4. If I delete a public playlist, is there a way to get it back?