@a0128958, sorry for the delayed reply.
Looking at your moisture graphs, Zone 1, 5, & 8 watered on Friday due to the limited allowed days available on the Flex schedule (Tuesdays and Fridays). The weather forecast (as of Friday) appears to have indicated that your soil moisture graphs would have fell below your allowed depletion tolerance by Tuesday (tomorrow) -- as such, the Flex schedule watered on Friday.
Zone 2 didn't water since it had received a manual watering earlier in the week.
As of 9/11, your zone's soil moisture levels were the following:
Zone 1: 48%
Zone 2: 112%
Zone 5: 52%
Zone 8: 24%
Please note, Flex schedules work best with less restrictions and are not recommended for limited (less than 3 days/week) watering restrictions.
I believe this is a display issue as your watering time is 7p and we report in UTC time. If your watering times took place in the mornings, the watering icon on the moisture graph should align with the same day as the watering took place. I believe UTC changes to the next day for reporting purposes at 6p MST.
We did record a .47 in rainfall on 9/9, however it's important to remember that warm season grasses have a 9 inch root zone depth. As such, it's a big reservoir to fill. Have you performed a soil probe test to confirm the depth of your roots on a zone by zone basis? If not, I'd recommend doing so to fine tune your flex schedules (and the amount of water being applied to your lawn). For details, please refer to this support article: http://support.rachio.com/article/385-flex-schedule-tips
Moisture levels were forecasted to go below zero by Tuesday if no watering took place.
UTC time zone display
I hope this helps to explain the issues you noted. Let me know if you have any questions/concerns.