OHHH. Ok. Gotcha. Lifting the door handle won't set the car off. If it did, can you imagine HOW irritating that would be.
It will go off if the door IS OPENED without disarming the system. So if they bust a window and open the door, the door position sensor will set the alarm off.
I know some irritating after market alarms, the kind that are too sensitive, can do that if the car is set up in that manner.
From my experience, no, the alarm system WILL NOT go off by simply attempting to open the door while armed. People make mistakes, not paying attention and go to the wrong car..
You tried opening it from inside, huh, never done that. Possibly is knew? Window down? No idea. Does it BLINK BLINK and give you a beep when you lock it with the key fob?