Play order of music files

[PhilMcF]

I have just set up a Synology DS418Play NAS and installed MinimServer2 with full licence.
I access my music through a Primare Pre-35 using the Primare Prisma Ios app.
I scan my music to FLAC using dBpoweramp CD Ripper with dynamic naming set as
[GRAB]1,1,[Album artist][]\[IFVALUE]album artist,[album artist],[IFCOMP]Various Artists[][IF!COMP][album artist][][]\[YEAR] - [album]\[ARTIST] - [ALBUM] - [track] - [title]
All works beautifully.

However, I like to create playlists by copying a set of music files into a separate Playlist/List folder and then, using the folder view in MinimServer2, having them play in my desired order.
This all works well except that, try as I might, I cannot get the tracks to play in my desired order.
I have edited the FLAC metadata in the files so that the track numbers are in the order I want - but this seems to make no difference.
Could you let me know what I should do to get the ordering I want?
Thank you.