Thanks Grand and SK for the response. I just called my wife at work and had her go outside and unlock the passenger door. When she opened the door the alarm went off :(
After she silenced the alarm I had her then exit the car, shut the door (unlocked) and lock it with the key manually from outside the car. She waited about 60+ seconds, unlocked the door with the key and the alarm did NOT go off.
Could it be something in the lock switch in the door??