Please go to Settings->Zones, select a zone, tap "Soil Type" and check more detailed information for each soil type. Please find the attached screenshot.
Please let us know if you have any further questions.
Had the same problem.
Go to Settings>Zones>Zone 1>Smart Zone>Soil Moisture. Change the settings for both low and high. Set low to 75. Set high to 85. You can adjust these as necessary to your desired watering pattern.