I was asleep for that one Good to know im not the only one who find a block here on kano with S9v1
looks like all those "bad" miners still able to find blocks 
The issue is the total number S9v1 has found is well below what it should have - CDF[Erl] = 0.991261 with that last one.
(They're expected to have found almost 25 more)
Had all those machines stayed they could have hit those blocks.
...
Doesn't matter what they 'could' have done, since that's supposed to be random.
Unfortunately, history suggests otherwise.
You altered the history when you told the S9v1 to leave without a long enough sample size. Had they stayed the variance would of caught back up. Any sample size should be bare minimum one year.
The number of hashes and the number of blocks are the only 2 numbers that matter.
I've no idea where you got 'one year' from.
But they have also been hashing on the pool since I asked people to switch, just not as many.