Ok, the post order has been fixed...much better now!
As for the "since last log on" link. I haven't looked into that yet Tree, but the buttons on the left side of each forum change when there's a post you haven't read. If it happens to be in a forum you're not interested in reading, you can reset the buttons by simply clicking on the "Mark Forums Read" link near the bottom of the page.
I'll be looking at changing/rearranging the menu pretty soon...so maybe we can add the since last log on link at that time