Hi Krutsch
All input is welcome - it helps us make our products better. 
james
Excellent. Here's some additional input. I am running the latest BETA (S2.17 2015-08-06) and now all of my tracks within an album sort like this:
1, 10, 11, ... 19, 2, 3, ... N
If you have more than 20 tracks in an album, it looks like:
1, 10, ... 19, 2, 20, 21... 29, 3, ... M
The tracks display this way and actually play back in this order. This is a new issue from this build.
No changes to the album art missing from folders named with spacial characters (I assume this is still in-progress).