When using the web interface and marking older articles as read, the article count in the left article bar will update properly, but when clicking all stories again the articles I just marked as read will show up again. I had a similar issue to this about a year ago which Sam fixed for me. I have tried multiple web browsers (I use Chrome primarily) on multiple computers and the issue occurs in all of them which makes me think it is server side. The only way I’ve seen that lets me clear out these stories once they re-appear is to manually click on each one so they are marked read.
I have attached two images showcasing the problem. The one below shows my feed list prior to marking the 3 articles as read.
After marking the 3 articles read and clicking on the all stories button again, I should expect to see no articles at all. Instead, I see the following where one of the articles is still showing up even though my article list on the left says there are no stories.
The number of articles that stay marked as unread seems a little random. I know earlier when I had around 17 unread articles and marked them all as read, ~10 showed back up when clicking all stories.