So I don’t know if it was intentional, (like to solve https://getsatisfaction.com/newsblur/… ), but it definitely didn’t used to behave this way: mark all as read for all site stories now also marks as read items in shared stories.
The division between these two types of stories is a bit awkward. If they were both displayed together, then fine, mark them all as read. But as they are separate, this change in behaviour is surprising.
I found some shared stories marked as read, but I believe that is due to the background updating. I typically mark previous as read, but am sure news blur is adding earlier stories to the list AFTER I’ve marked that timescale as read. So, next time I mark previous as read, it marks the new ones as read also. So even though I haven’t seen them, they were there.