I have a mix of wma, mp3 and ogg files in a folder. Music is sorted by track number by default. But the ogg files are inserted in alphabetical order instead of numerical.
e.g.:
1 (wma)
11 (ogg)
2 (mp3)
...
10 (wma)
I didn't try other formats like flac, spx or opus yet!
You misunderstood, music is meant to be sorted by track numbers, but ogg's are inserted in alphabetical order.
(By the way numeric order is on by default anyway.)