So, that's kind of a problem. A lot of people don't like multiple discs from the same release taking up space and cluttering the collection. I just went through all my Phish shows and condensed them to 1 album each, making the disc number represent the set. iTunes/iPods sort this correctly and plays in the right order, and it works well. I'm sure other players would too, it's just standard ID3 data. It would be great to allow sorting in this manner on Pulptunes.