Hey!
The garage sensor doesn’t directly affect the profile; they are generated from whatever average value your ecobee uses. Only sensors in the active comfort profile get used.
Usually inverted profiles like this caused by external heat sources (fireplace, space heater) that are used more in cold weather. My initial guess was the garage heat source, but that doesn’t seem to be affecting the other temperatures in the house. Do you have any other sources of heat?
If you PM me your serial number I can take a closer look at your data to see what’s up.