Album handled confus to me sorry.
the first VL006.mp3 in Folder added as Album ?
if not a bug Forget it ;)
Yes, this occurs because of the album handling as previously described.
Because the file is not located in a CD folder (naming "CD1", "CD 1", "Disc 1" etc.) where the other files are, it will be treated as an own album.
If the file is a member of the album, please it in any of the CD folders to solve it.