You also need to make entries in:
Preferences: Searching (2 places)
FWIW I move All the Authors there (when more than 3) and set The regular column with either the Books 'edited by': Joe Smith (ed) or <Various>
This was my way if keeping filenames short for my original reader that used them for selection.

The column originally started out for a place to put the Authors Real name when the cover had a Pen Name (or the book was later released with the real name, so I put the other one there) .