i think everyone is misunderstanding the situation here, ie; its normal - bar the extra beep.
when you arm the alarm it beeps, flashes fast for a while then sets its 1 flash per second.
thats all normal.
These extra flashes everyone else is talking about is when you come back to the car, not when you lock it!
fluffybunny is talking about locking it! ignore the flashes thing.
The doors are all locking fine in this case. If it is a stuck microswitch, the doors wont lock.
The extra beep is the car saying there is some kind of 'fault', more than likely the car just has a low battery.
any other random warnings poping up on your screen? VDC etc?