When I first moved into my house about a year ago, for a place this size I thought it was odd it had two thermostats, especially since they were only about 10 feet away from each other.

I guessed correctly before even speaking with the former owners that one was for the heater, and the other was for the AC. Part of the reason for this was because when it house was built it did not have air conditioning. So about 15-20 years ago they added a central air system to house in addition to the boiler based base board heating system that was installed when the house was built. So the heating and cooling systems are on completely separate systems. At the time they did the upgrade it appears they installed a couple of digital thermostats.