I have my Zen set to auto mode with a 4 degree offset. If I adjust the temp manually it works correctly (example: set to 74 it will have a heating temp of 72 and a cooling temp of 76). When adjusted manually these setpoints also show up correctly in the ST app and on my Home Hub.
However, if I change the temp by using the app or by using Google Assistant then the offset widens to 7 degrees. (example: set to 74 it will have a heating temp of 71 and a cooling temp of 78).
Can someone explain why this happens with the default device handler? There is a custom handler that works correctly but it is outdated and doesn’t have a UI in the new ST app. ST is big enough that they should have proper devices handlers for all devices the are officially supported. Also, you’ll notice the blank drop down bar above the temp in the app, that doesn’t even list “auto” as an option, it has to be set manually.