I'm noticing the same thing.
A change to some flex watering parameters are not immediately seen in the soil moisture window. It's like the changes go to the cloud, where they're processed on some frequency, but not real time, and then the moisture chart and/or data are only updated on a set frequency (once per day, twice per day, etc.), not real time.
An easy way to see this is go change the weather station on the main screen, and change it. Then, you'll see that weather station doesn't change in the soil moisture window real time. It takes some amount of time (overnight?) for batch cloud processing to process received information and then update the soil moisture window data.