Well all's OK finally now.
Due to a mistake I made getting the block to recalc it's %, I had to restart twice.
But all OK now, block % recalculated and Reward processing done.
Payout will be ready before it's due

Then I'll look into how the shift got closed with no shares in it.
Must be a bug in the processing logic somewhere that can sneak in during a double restart.
Mine on!

Huh... I must have gotten incredibly lucky on that last shift - a2sr6 daisy - 176TH/s as opposed to my average of 137TH/s shifts normally ...