Need help tuning Quickfuel carb

Are you suggesting rotor phasing?
No. I'm saying there must be a reason why there are two strike zones on every terminal and black (carbon?) on the rotor. Don't know enough info to pinpoint cause - effect. If that's carbon, and its tall enough, that could explain the top strike zone. Then the question is why.

It appears that the electricity may be finding a lower resistance path to ground than through the spark plug tips. If so, that's whats showing up as misfires. Again, why? Is it something in the cylinders that's making it difficult for the voltage to jump and initiate the current flow? or is it something in the delivery path?