Snake Skinner

OK I've had 4 LS1 cars and still have 2 of them and have never had this happen to me. After locking the car with keyless remote or even using power door locks inside the car when you walk away it beeps twice like every one of them do. Well now with this other 98 Z it beeps the horn twice slowly after the two quick beeps. What in the world is this and how do I make it stop? It's like it starts to set the alarm and does it once with the two honks and then stops? WTF???