If the game system stops reporting, then the data will get old.
There is a system that lives between the "status" (what you see on the page) and the "game". There is a middleman system that we use to monitor statistics. We use this as a push/pull. Each game server pushes status to the monitoring system while other systems (like our status page), pull information from that system.
We represent the age of the data that we get from the monitoring system with our status so that you can know the credibility of the data, but it appears that the monitoring system gets into a mood. This will be most apparent if a lot if a lot of different servers (across multiple games even) are late reporting.
-dan