Netro currently doesn't support the feature to treated multiple zones as the same physical area and water them exactly the same, which we may support later. As your zones have the same configurations, Netro's smart schedules should be almost identical for all zones. It's different now because you might manually water some zones before with different time, so each zone have different estimated moisture level. But it is totally fine to water zones in different days. We make sure the moisture level in the a reasonable range for all zones.
Please let us know if you have any further questions.