Aurel, please notice I've just updated my post.

That makes sense but the pool found a block (#316177) about 6 1/2 hours ago so it seems our payout after that should have went back to normal instead of dropping if what your thinking is true?
Yeah, you're right. Probably it's not in connection with blockfinding then. I'm a bit guessing here.
I'm not mining right now, the unpaid shares did go down and then up without apparent connection with shares being credited though.