OK, that's just one of a number of different ways we use the site, I guess. I always go to New Posts. When I click More it brings up another list which contains a lot of stuff I've already read. Now if that list is ordered by date/time then I was supposing something that I hadn't seen because it was new, would scroll off the top because of what I'd call this bookmarking feature. I think I see what you're getting at but I suspect it's all in how you navigate.