Hi I am the admin of 666pool.cn. We just noticed this bug today, someone got more payment than the actual amount that they should get. So the balance of the pool's wallet was too low to pay some other miners. The good news is we just fixed this bug, and seems everything is fine now.
Would you please let me know your NPW wallet address? I will transfer the amount that the pool owes your from my personal account. Sorry about this issue.
Any other miners who didn't get the payment please contact me as well, and who get more please keep it as a bonus