Is there a limit on the kasa app as to how many devices you can have? I flipped the breaker for half of the house and was able to successfully program the problem switches. When I turned the breakers back on, I had 2 switches that were programmed before, go solid red on me.  I then reset the 2 problem children, and the 2 previously programmed that went red connected almost immediately. 

@TMG91 

I'm having issues with all of my HS200 devices which have Hardware V5.  They all have Firmware v1.0.2 and will not update.  I do not have access to the devices via the API communication.  They work fine in the phone app.  Were you able to get your devices updated?  If so, how?