Use case:
Selected 2 albums in Inbox and used File Organiser to add them to the Music Library, and in a Music Library tab selected the "Recently Added" playlist.
The order shown is (disk-track): 1-11, 1-10, 1-09, 2-01, 2-04, ...
Tracks should be added in (reverse?) order, at least Album, disc#, track#
Edit:
Some other strange thing: if I sort the "Recently Added" playlist by "Date Added" the '#' order is: 11, 10, 9, 12, 15, ...
As this tracks all show "... 19:05" in the date column there may be many reasons for the different order...