I can confirm that the flow sensor data your Controller is sending up looks sane.
Some references from your Zones over the last 3 days
Zone 1: 16.5 GPM
Zone 6 : 9.1 GPM
Zone 10: 9.4 GPM
If these values seem accurate to you (in the sense that Zone 1 should be drawing more water than Zone 6 and Zone 10) then I would say the sensor is working correctly.
If you have any other questions let us know!