As you can see these two fills are shorted, and they should not be. No amount of unfilling and filling fixes the issue. I don’t see a way to assign priority, however this isn’t even really a priority issue as neither fill is pulling back. What’s causing this behavior?
Funny that you mention priority. Look at the Zone Properties dialog, lower half, left column of properties, 2nd from the bottom: “Zone priority level:”.
If it was a snake it would have bit you.
EDIT: I don’t know my right from my left. Corrected, above.