I just checked. The win count is 14. The fact that you are seeing a 12 is a bug, and I think I know where it is coming from. GhostRaven is close behind you, he has 11 conversions.
Me and GhostRaven no get the same problem, we can make anymore black hole. yest we insert the command and see the progress begin, but when we log back in, the command was canceled.