It’s totally possible that you might have Smart Cycle turned on, but based on your slope, soil type and nozzle you might not need Smart Cycle. See https://support.rachio.com/hc/en-us/articles/115010379767-Smart-Cycle-and-manual-cycle-and-soak-features
And look at "How long can a zone’s watering duration continue before it needs to get cycle soaked? " under the FAQs.