Well, could you provide a screenshot? I still don't get it. The website does not even show the age of submitted shares.

Exactly. Some people mine on relatively weak laptop GPUs. It takes those miners usually a couple blocks to hit the payout threshold.

I think your confusion stems from the terms I've been using. When the pool processes a fully confirmed block it distributes the reward among the miners who contributed to it. And of course it distributes the full block reward - fees. When I said "payment" I was referring to the process of transferring coins between the pool wallet and miner wallets (those whose balance equals or exceeds the payout limit).

Correct, the full block reward was not paid for that block because we still did not have enough shares to hit the end of the PPLNS window. Just like for the previous block I have manually distributed the remaining funds proportionally to the miners. 

I also want to clear up a misconception here. The amount the pool normally pays out for a block is not directly related to the block-reward. Sometimes a significant amount goes into miner wallets that have yet to hit the payment limit.

Regarding the network difficulty: The pool uses the information the daemon returns from "getblocktemplate" RPC call.

Yeah that was a good one :-)

I've read your post three times but I still don't understand the problem. Could you elaborate? :)

What's your wallet address?

Any time.

Looks like your client got banned. Reason, unknown. You did nothing wrong. Please keep it stopped for at least ten minutes and try again.

Could I have your wallet address?