currently in our Master DB, we only have #5, #5-A, #6, and #6-A; no B covers for these issues. They may be unique to your db particularly if you have a qty in stock that locks them in and prevents them from being removed (to match our Master db when you download a weekly content update).
If something needs removing, its best to email us at support@comicbase.com and our editorial team will look into it further.