But isn't it supposed to do that? There were only 5 unread entries. Page 2 should be blank. When you read the 5 unread ones, page one will be blank too (well, it will have a message).
I use my laptop to read DFF and almost always use the New Posts feature to access the posts.
It really helped me when I learned that clicking over to Forum would make the posts I'd read disappear from the New Post screen as opposed to simply no longer being highlighted on the New Posts screen.
And it was so helpful when CWilli pointed out that the Mark Forums Read button would likewise make the unread posts disappear when I clicked the Mark Forums Read button. Those unread posts were then gone from the New Posts thing.