Little question about counting?

Hi, I am not long in touch with Devonthink 3, so it would be nice to get some help. For example, I don’t understand what the “counting bubble” counts? I put 80 pdfs in one group i created before, what the inspector rightly indicates, but the bubble counts only 12 (although 80 are inside) and having a look on my groups in my database, I see something like that: 12/ 80 or 396/444.

Does anyone have an idea? Thanks for help!

Unread items, perhaps. There’s a preference

which if turned on (Show number of objects in groups) does exactly that
Bildschirmfoto 2022-05-18 um 11.08.07
So I have 16 objects in my trash and 2 unread items in my inbox.
And if I turn that preference off, I get
Bildschirmfoto 2022-05-18 um 11.08.15

The preference is, btw, described in the user manual.

Thank you for your reply, it helped. This number, i read somewhere, indicates the number of books still not read until all books are read, then the number of all books becomes indicates. A little bit odd for my taste that it cant be changed. I have no need to become informed about my not read books, but the amount of books in the different groups would be useful information. But its the choice of the developer…