I started over to reset all soil moisture accumulated values. Successfully done without using blink process, but only because franz bailed me out doing configuration work on the cloud end for my account.
Look at soil moisture numbers immediately after starting over. They show a bank balance of zero for yesterday in spite of no rain and no water and 0.30" of crop evaporation. This isn't correct, but, how is the system to know what was done yesterday before the system was set up? OK, fine. Zero bank balance thus makes sense.
Now look at today. Prev Moisture Bal still = 0, Rain and Irrigation are zero, crop evap = 0.30 in, but bank balance (Current Moist Bal) is still zero. This isn't correct, but again, how is the system to know what was done today before system set up (flex schedule set up)? Thus, again, zero bank balance makes sense.
Now look at tomorrow. This is second day that flex schedule is 'in control.' So now bank balances start being computed, day by day.
After careful study, assuming the above I just wrote makes sense, I think a zero bank balance makes sense until the next day after a flex schedule is established.