Some schedules are skipped because of rain. If the default weather provider (DarkSky) doesn't work for you, you could try other weather source in settings->controller->weather provider. The latest version App has a new feature to support Weather Underground PWS, in which you can specify the weather station you want to use. On the other hand, you can increase the threshold of rain amount, such that even with rain, Netro can still water your lawn. This is customized in settings->preferences->Rain. The default value is 0.2inch, you can increase it to e.g. 0.5inch.
Please let us know if you still have any question.