I am trying to figure out why this app is giving me two different watering schedules for essentially two twin plants. I have two philodendrons that I created from cuttings at the same time. Their small plastic pots are the same size more or less — one might be an inch larger in diameter. They’re placed same distance from same window. Everything — same, same, same. But this app has one watering schedule for every 28 days and the other is 14. I keep trying to make the app sync up by watering and fertilizing at the same time but it won’t. Any ideas?