pearl01rx300

Hello, When I press the unlock button once, on the factory alarm, the drivers door unlocks only (no audible beeps) and when I open the door the alarm sounds. If I reset everything and lock the car, then press the unlock button once, the drivers door unlocks (no beeps) press the unlock button for the second time, all doors/rear hatch opens and I hear the two beeps. Open the door and everything is OK no alarm sounding. Can some one help?