Garr can you address these calculations?
Sure thing.
The calculations being used here can only estimate the output of a given mining rig + pool combination. It turns out that our pool has had a bad luck streak for a good while and we have since switched to mineb.tc which is proving to be a bit more reliable, with more consistent payouts. We should see output much closer to these calculations with the coming dividends.
Cheers,
Garrett