This makes sense so I added it to Mantis since it has been requested many times.
http://www.ventismedia.com/mantis/view.php?id=5215

This doesn't work because added data includes date and time, down to the second. A list like this currently isn't possible, I'm afraid.

Hey everyone, I'm trying to make an auto playlist that takes all the songs I've added in the past 15 days, and sorts them by date added and then track number. The problem is, I can't get the track number to work. I've added it in the custom sort order box, but it seems like the date added still overrides it, and I end up with albums that play from the end to the beginning. Any ideas? P.S. I've tried it with tracklist sort order from a-z and z-a.