Currently, some card pages (e.g. Item Card) contain Attachments/Documents FactBox, where user can attach files/documents to a certain record. But, on the list view this specific FactBox is missing, and therefore the number of attachments/documents are not calculated to the Attachments -FactBox pane. Only visible FactBoxes (e.g. Links / Notes) are calculated.

Thus, user cannot know if any documents are attached to a record, unless the card page itself is opened. The idea of FactBoxes is to reduce times you have to open card pages in the first place.