As a final word, I really would like to see if Hawthorne Effect ( observation changes behavior) will work on this analysis. Just because we have determined a "stable timeframe" and "max ROI date" can change the voting behavior of people and a new study would be required.
This is what I am clearly expecting @Tibra.
I will keep on analyzing Sundays.

To me it is too much resembling the fluid flow, starting laminar and getting turbulant..