To achieve the results with NH, your gear is obviously being rented and the average rental price is higher than expected BTC earnings.  I'm curious to know what backup pool you've set on that miner, and if you've configured it to have a minimum accepted payout rate on NH (by setting your password to something like p=0.011).

By the way... you've certainly proven that your first assertion of "no such thing as 100% payouts" from your first week observations is incorrect .