sounds like something that happened to me a while ago. the car will act up if it has a low battery. make sure your battery is in perfect working order. i had to replace mine it also sounds like the buttons on the remote where pushed to many times with the car battery low so there out of sync. they get out of sync easily they are easy to reprogram. but it sounds like the alarm system is doing exactly like its supposed to remember the siren senses battery voltage and it will go off if power is disrupted the siren has a battery built into it so it will keep going off with the car battery disconected. i dont know if this helps but it happened to me just my 2 cents.........