Ever since 2008, Google has been figuring out which content are forum discussions, and showing the number of posts, authors, and the last post timestamp as meta information within the SERPS description. They're pretty accurate when it comes to any vBulletin forum, and even StackOverflow (which is a unique Q&A platform).
However, ever since we switched to our own in-house platform (at least, I think that's when things went sour), all of our pages are now categorized by google as Blogs instead of Discussions.
How can I force Google to understand our content??