Troubleshooting problem with file numbering display

[Budgie]

Hi Simon, I am sorry I pressed wrong button.
Meanwhile on the same subject, I have checked that my Album is complete in one directory so there are 58 files and they are shown in the correct order on the NAS and in Easytag, however when I select the Album to add to playlist on BubbleDS and check that playlist the list is re-odered after the first 29 files which is the first of the two CDs.

I have attached screenshots which I hope reach you.        

I am not sure where the re-ordering comes from so would appreciate help please.