I tried to change a couple of my watering schedules to add/remove some zones. When I tried to do it from the web app, I could not uncheck nor uncheck any of the zones. It was as if I was doing nothing at all. So I gave up, went to the IOS app, and could do everything just fine. Seems to me that the web app might be broken in this area, because I seem to remember having it work last year — either way, they should function the same.