The first number is the number that they have to distribute. The second number is the amount that have been flushed to them. When that second number starts to grow, it usually indicates a problem with the proxy server flushing to the main server.
I am not entirely sure which ones that Mika flushes through, but, it is just a matter of time before the blocks will be flushed and counted in the stats.
I don't know how much that helps, but, it's all I got 🙂