Ogg not in numerical order

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!

Is this a bug on ogg file track numbers?

(DOpus 10.5.4.1 on Win7)

What are the ogg files being inserted into?

I meant the file list DOpus displays.

Turn on numeric order filename sorting in Folder Options.

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.)

Which column are you sorting by?

Sorting ogg files by the Track Number column appears to work here, at least the way my test files are tagged:

Well, your screenshot is correct, but mine isn't.
(Needless to say, other similar wma or mp3 music files are sorted as expected in other folders.)

Thanks for the additional info, I've been able to reproduce this now and we will fix it in the next beta.

Still not fixed in 10.5.7

This was fixed in 11.0 Beta 9: Directory Opus 11.0 Beta 9

OK, I wasn't looking into the 11 change log since I've decided it wasn't worth to update. Thanks anyway.