So from your screenshots, nothing looks too crazy as far as what the controller is doing. Your ET starts to get high into the upper .2's (0.28 on June 11th), which means your frequency will increase leading to less days between watering.
How do you feel about that 0.8 crop coefficient you have? I don't know your grass type that well, but the default cool season grass coefficient is 0.7. You have it set higher means the system thinks water is being used up more quickly, so it'll want to water more often.