29.04 05:35:56 9h 28m 6041 19191553 0.00361762 <-------------------------------------- (Block 233685)
28.04 20:07:17 0h 30m 340 1080488 0.00763081
28.04 19:37:10 3h 35m 2355 7643323 0.00734798
Worker payout method was proportional for all these blocks, so it is expected to get paid pretty evenly for each block, with condition that ratio of pool hash rate / my hash rate stays the same. As you may see by the number of my shares and the total number of shares for each block in the sample it is true, how do you explain more than 50% cut for block 233685?
It may be cause by some connectivity problems between the pool and your miner, so less shares were submitted during this round. Can you check this ?