Time to visit the dealer.

Just yesterday, this started happening...

I park my car, turn off the engine, and open the door. After exiting and closing the door -- without me touching the door handles -- the car beeps the 'lock' beep. It then kept beeping -- beep, beep, beep, complete with the headlights blinking off/on -- for 5-6 times. Then it stopped, and I confirmed the car was locked.

I'm pretty sure my door handles have not been replaced. Even if they have, it's still something to get fixed.

--Neil