Thank you for the suggestion. I set the poll interval to the shortest option (5 seconds), and the wall switch does now control the lamps. However, it takes up to 5 seconds for the lamps to respond. Is the the fastest I can expect from my current setup? If so, are there any suggestions in changing devices. I'd still like to use my TP Link smart plugs (they don't seem to be the issue), but I'm willing to change out my wall switch to another option if it still looks like a decora style switch but functions quicker than my Kasa Switch.