Help please. I have a new house (ok, three and a half years old) The builder installed programable but not smart thermostats. To be expected I guess. Anyway, I got a really really good deal on two Amazon smart thermostats this week and just tried to install them. The upstairs one snapped right on, connected to the internet and seems to be working fine (it's been less than an hour) The downstairs one will not connect. Turns out the wires on the faceplates are not the same and the app is telling me the downstaies terminals are not compatible with the thermostat. How is this even possible in the same (new) house? Is it fixable? Should I return one or both of the thermostats?