Show us an example (screen shot). I would think that the track number, or at least chapter number, would be the unique identifier (before tags are added, so like 01-Title 1 chapter 1, 02-title 1, chapter 2 ) so sorting them should be by track number. ALWAYS include track number in your metadata rules. Whenever I rip or extract anything from a disc (CD, DVD, DVD-Audio or SACD) I always have [track #] - [artist] - [album] - [name] at the very least. Then, as a byproduct, simple sorts are always in track order.