Check out the Signature thread http://forums.galciv2.com/354479. I examined it from both GalCiv2 as well as JU and in the recent posts lists on both sites it's listed as having only 3 replies where in fact it has more than 25.
More than that there is no indication that the thread even has a second page nor is there anyway to directly access that page. The only way that I was able to see my reply was to manually add the "/page/2" string to the url to get the following link.
http://forums.galciv2.com/354479/page/2
This is the first time I've seen such behaviour. Although new replies aren't counted, the last replier and the time of the last reply are both listed correctly in the recent posts list plus the "goto last reply" link in the recent posts list does take you to the last reply so that is at least one way to get to the second page even though there are otherwise no next page links in the thread.
Strange.