folder view and track order

[Nothung]

I used the editor in File Station on my Synology NAS. I wouldn't normally do this but thought it would be quicker to make a small change. Normally I would use XLD to add tags when ripping CDs and Fission or iTunes when tagging files such as audiobooks or music recorded from radio.

The original files would have been tagged by Fission or iTunes and the problem with file 4 happened after I changed the Album name with Synology.

I am afraid I don't know what a ©day field is or how to correct it. It doesn't show up in any tag editor I have access to as far as I can tell.

Hope you can explain it and point me in the right direction to correct it. I wont use Synology to change tags again!

Very many thanks.