I have a 2004 Chevorlet Malibu that has been doing some odd things lately.

Before when using the remote control for your keychain to lock and unlock the doors, the malibu did so without a sound (except the unlocking sound),
now everytime i click the lock or unlock buttons, the horn beeps once.

also the anti theift system on the car is triggered randomly every month. I've monitored very closely if there was a door no properly closed or a window open, yet randomly my anti theift system triggers and i am forced to leave my key in the ignition for 10 mins for it to reset.

are there any forums experts that can shed any light on what i can do to fix these odd issues??