Question on File Ordering

[Budgie]

I downloaded the 30 odd files for the BBC series Living with the Gods and they ended up in my working directory in alphabetical order rather than in the series broadcast order. To correct this I just added the number in the filename so for example:-

Living_With_The_Gods_-_The_Power_of_Song_b09c0pw4_original
became

Living_With_The_Gods_-_10_The_Power_of_Song_b09c0pw4_original

This corrected the file order in my working directory so I then uploaded the series to the NAS and did a minimserver rescan. Strange but the order appearing in my control point (BubbleDS Next) did not change.

I then changed the title tag to include the series number. Now all is well.

How does minimserver determine the order of tracks in a directory and am I missing something?