This might be dumb, so forgive me in advance. I basically want to know what the difference is when I press the lock button on the key either once or twice. I know when I hit it once the doors lock and that sensor at the front middle of the dash stays red. If I hit it twice, the horn and lights go and the sensor blinks red. So what am i missing here? And why does the red light sensor stay on? Either one press or two locks all doors.