If you do not want smart zone schedule to override your own programmed schedule, you can set up the Smart Zone level from Advanced to Basic, which only skip rainning days for your programmed schedule.(Go to Settings->Zones->Smart Zone)
In this level, no smart schedule will be generated. You will need to add programs manually (go to Settings->Programs to add programs) and Netro will skip programs when there is large amount of rain(>0.2inch/ 5.08 mm) or watering regulations.
Please note when smart zone is enabled, your local regulations will automatic override your own program if there is any conflict.