Looking at: http://middlecoin2.s3-website-us-west-2.amazonaws.com/#1H3x2KT6K5cp1gDFSo5vQcezkXPjqZSxmM
I'm thinking you didn't reach a 0.01 balance before last nights payout. At this time there's about 0.025 divided over unexchanged and balance, which seems about on par for a days work for you.

It looks like h2o couldn't sell the coins, you had generated, fast enough for the payout. They will be included in today's payout.