Every few days that i rented more and the payout catched up i rented little higher speed, i thought it still counted for if the speed went down that it as slowly went down. Just proven wrong i find out with this last block. Why did you do that doc??
The work you did in the last 10 shifts at the time the block is found is what will get paid. You can see your stats in the shifts here:
https://bitminter.com/shifts (to see your own numbers you need to be logged in)
It is rare that we go this long between blocks though. 99.6% CDF on that round. So this is something that happens with 0.4% of the rounds. So one in 250 blocks will be this bad or worse.
This evens out pretty good for constant miners. For part time miners it can be harsh though, when we hit a dry spell.