You Are Right Kano by 90 %
But please answer the last question .

why when block discovered elsewhere all miners's bestshares still working and only pool's minesrs has been rest ?  (sorry for my language )

solving Block anywhere not effect my work expect my pool 's group !!

I think I will run my miners alone in solo tunnel until I solve the block without Disturbance

This is my point


If my point is wrong I will sell my rigs and I 'll let insects live with me in my home .