Album tracks in wrong order

[zaentzpantz]

SA2RGA08SN/02
Each album shows and plays the tracks in a mixed up order on my player despite them being labelled correctly.
The id3 tag information has the tracks numbered 01, 02, 03 etc correctly at the start of each filename, and I have even added 1,2,3 etc to the front of the track titles to try and sort them.
The id3 track numbers are correct as well but for instance I get one classical album that lists and plays the tracks as 3,5,7,9,10,8,6,4,2,1.
How does the player sort the tracks in each album?
I have tried:
1 Making sure all tracks start with 01, 02 etc.
2 Making sure all filenames start with 01,02 etc
3 Changing track id3 tag to 01 instead of 01/16
4 Erasing all id3 tags except title, album, artist
5 Making sure the time stamp on each tracks is sequential
None of the above have worked but I'm still searching.
It seems to be a common problem if you google this.