A few times over the last 2 weeks the server had gone down and when it came back up the clock would be 2 days ahead. Runpuck always fixes it, but if you post within that time, flood-control makes you wait until the same date arrives again.
So on February 18, the clock at the MES was set to Feb 20 for a few hours. If you post something within that time (Feb 20), and then the clock gets fixed back to Feb 18, it makes you wait until Feb 20 actually arrives before you can post again because otherwise it thinks you have gone back in time to try to spam it