Wizkid,
I compared the 'Shares Rewarded' numbers with several random miner's workers who was below and above me in TOP-20 list. They all have 94% to 95%. And only my worker have 84% of shares rewarded. I want to emphasize that I haven't stopped mining till today's post and mined at a sustained rate for a week before.
I think during the manual payout routine you've underpaid my reward. Probably, by human error.