I'm crossposting this as its worrying me.
I apologize if someone already asked this.
Granted they may not be mining litecoin exclusively. But shouldnt zenpool be #2 on that list?
They should be "unknown" since they are pretty much mining ...

?
If you are saying GAW is the "Unknown" part of the Litecoin chart, that's not possible. The "Unknown" has always been there and has not suddenly grown by 150 GH/s. It's not a single entity, just a lot of smaller pools and solo miners.