I have 8 HS103's in my house...most have worked without issue. After re-setting up schedules on 7 of the 8 I noticed some going on or off about an hour or 2 or 3 from the programmed schedules on my IPhone.  This morning I noticed when looking at 2 that had turned off 3 hours ahead of schedule, 1 listed my time zone as America/St Thomas and the other as ETD5EST.... but why would they change on their own??? Anyone else have this issue??? I will also mention, that in the Kasa app, under ME, the correct time zone is displayed America/New York.

on a side note, I did reset each to factory settings before I set thei schedules.