@Bethel.8009 that was something that surprised me: the "dumb" switch didn't work regardless of the smart switch being on or off. I installed the switch for a neighbor. The wiring for the 2 original...

@Bethel.8009 thank you for the response. It certainly makes sense that it matters which Kasa switch wire is connected to the hot wire. I rechecked the installation instructions on the Kasa app and...

Looking for an explanation for this: In the garage there are 2 single pole switches in the same box sharing power from the same wire. One switch controls the inside ceiling light and the other...