None of them are listed as available for installation in the v3 client. I don't have any of these anywhere on my computer, contrary to your assertion. (I did install PitBull_FullBar after finding it in the list, just to see what the v4 Client would do with it.)
For that matter, exactly how would you know if I had these installed, anyway? That information didn't appear to be included in my bug report.
I do have a copy of the addon PitBull_FullBar on my computer now, although not in any managed WoW installation. I can maybe understand that addon appearing in my list, even though it has been marked as Abandoned for a long time, since I was the author.
In fact, I marked it as Deleted yesterday, and it's still showing up in my "Get More Addons" list today, whereas no other addons in the Deleted stage appear. It does make sense if it's there because I'm the author, but that doesn't account for some of the other Abandoned projects showing up in the "Get More Addons" list.
Edit: Yes, I tried to edit my Invalid ticket, but after typing all this out on CurseForge, I got an error message saying "You do not have permission to view this page" when I tried to sumbit my comment there. That's why I'm posting in this thread, to avoid opening a new ticket.