Damn, it got recalculated to a normal payout. Still for 20 seconds not complaining.
For such short rounds the variance is over 50%.
It seems your miner have submitted 8 instead of the expected 6.66 shares (with target 20 shares per minute). For the same round my miner have submitted just 2 and my reward was 3 times lower than expected.
I think it's fair for rounds below 2-3 min to recalculate rewards proportionally, but wouldn't complain if they are not.
EDIT: 'proportionally' (for the round) is not the right term here as it will equal to the score reward - proportional for the last 5 min i.e. taking in account some time from the previous round will be more correct
I'm afraid any proportional recalculation breaks the statistics and should be avoided. There should be one and only algorithm that is fair and it should not be disturbed by any artificial interventions.
