Payouts each block are if your reward is over dust (0.0001 BTC)
A 14TH/s miner is well above dust but at the start of your 5Nd 'ramp' there might be a dust reward.
Dust gathers into dust bunnies under the bed and awaits the new accounting system completion.
Thank you for reminding us this. Have you considered writing about the dust in the
Help -> Payouts page?