Hi McKynzee. I'm using Android 7.1.2 and the web app. On further investigation prompted by your questions it turns out that I don't get the problem on the web app, only on my phone. It doesn't seem to matter which schedules - I've got one fixed schedule and two daily flex ones - if I specify watering days, they are one day slipped. I'm in the UK about 25 miles SW of London.