You also need to be in your Samsung Smart Things app and go to the Hub and then the three little dots on the upper right corner and it should say Z-Wave Utilities. Select that, then it should say something about exclusion. Tap that and at the same time be in the Z-Wave screen on the thermostat. Let it work, took two times but it finally did it.
Then I was able to use the Honeywell Thermostat Z-Wave for the device to add and it connected right away.
Shoud have gone to the actual devices websites yesterday when I first started trying to do this. Not the Samsung website.