There are zero rows in asset.copy_part_map for the item showing "Disk 2" on the second bib (1399132). There are zero rows in biblio.monograph_part for record 1399132
Another clue that I realize, there is a "Disk 2" on the first bib but the copy is OPAC invisible. It belongs to a copy that is not showing here. I believe that somehow that opac invisible copy part is getting attached to the next visible copy.
There are zero rows in asset.copy_part_map for the item showing "Disk 2" on the second bib (1399132). There are zero rows in biblio. monograph_ part for record 1399132
Another clue that I realize, there is a "Disk 2" on the first bib but the copy is OPAC invisible. It belongs to a copy that is not showing here. I believe that somehow that opac invisible copy part is getting attached to the next visible copy.