Here's what happened, far as I can see.
This morning, the clock was fixed so that it matched the correct hour and minute as real-time clocks. However, they were 12 hours ahead. So a post made at 8:52am according to RL clocks, actually had a post time of 8:52pm. Technically, we were posting in the future.
The server admins realized this and fixed it. Just before they fixed it, you sent your PM.
So now QCDN thinks you sent a PM 12 hours from now. QCDN also requires you wait 60 seconds after sending one PM, to send another. You'll have to wait 12 hours and 60 seconds until you can send another.