I am not sure why the forum would say there are no new posts. Never happened to me. Perhaps some kind of browser cache issue?
However, regarding Forum Rank, your rank is set to count posts made for current
month ("This Month" column on this page
). Thus, if you didn't make any posts in January yet, you won't have a rank and it would display zero posts. However, that does not mean you don't have any posts at all.
PS: Number of posts for that script update every hour.