Honestly, the way it grows it doesn't make sense. What I'm thinking is that another pool is actually just a proxy for middlecoin. As the pool grows, it becomes larger, but gradually, and without big sudden changes because it's just a lot of smaller members joining. It would also explain the bumps in the history. They are HUGE if it was one persons setup, at one point half the hash power is gone. However, it makes sense if they lose a server link or type a line of code wrong...
Just a guess.
if theyre testing a bunch of chips it would make sense that they might be changing the clockspeeds/monitoring cooling and looking at all sorts of metrics, as well as possibly testing drivers and programs because the other asics came online with cgminer supporting them... that wont be the case for scrypt asic