Check all of your program start times. It may be operating more than 1 time per day.
Also, check yo see that you only have one active program.
It is not unusual for the home owner to be oblivious to the concept of programs A, B, and C.
Check to make sure you only have 1 program active.
Thanks. It's the first thing I did after turning off the water. That's a mistake we made when we first moved into the house two years ago, but even then, it wasn't this much water.
I think I am going to have a leak detection service out on Monday to see if they can help figure it out. We have no wet spots by sprinklers. Is that where the water would have gone if a valve was stuck open? I have walked around everywhere, and our land is dry.