Today, I went around the house to start the season, checking springklers, and one zone wouldn't stop in manual mode. I tried to be closer to home to get better Wifi signal. It still would not stop even if I turn on/off other zone. Shouldn't  manual stop override any previous malfunctions? I had to shut the main sprinkler valve for now because there was no way to stop the water for one particular zone.

Any fix for this? I am planning on a leave and that was the whole reason I got Netro, but this worries me if water won't shut off while I am away.