processing order issue between tagValue and tagFormat

[simoncn]

Work.Merge={Work_Set} adds the Work_Set tag as an additional Work tag, so the file now has two WORK tags:

WORK=Ballade no 1
WORK=4 Ballades

When you specify a multivalued tag in tagFormat, the values are combined with a default separator ", ". This is what you are seeing. The separator can be changed or removed.

If you browse by Work instead of Composer-Work (so that tagFormat is not applied), you should see the two WORK tag values shown separately.