Contest of Mayors

I have the exact same Green Plumbob points for tasks as you have in your screenshot. E.g. upgrade DC zone = 800.

These are not the points that are doubled. If you look in your Calendar and find the Double Mayor's Pass Points Week image, you will see that (a) it is Mayor's Pass points, not CoM points, that are doubled, and (b) the icon on this is the purple points, not the green ones.