Recently I noticed that my outside temperature reading is off by about 10 degrees, on a cool 60 degree night it'* still reading 70+ even after hoping on the express way for about 20 mins, also heated seat isn't getting real hot

just a guess but have you called the dealer to see if some adjustment can be made?

If you are still under warranty, the dealer can look into both issues.
My outside temp sensor is located just in front of condensor, directly behind the grille and reads low only when it gets wet, until it dry'* off. That sensor can easily be replaced.
The heated seat problem may show a body code if they scan the car too...sometimes also if it is not cold inside the car, it wont produce much heat ...that info might be also found in the Fsm..(manual)..