Yup, just as I thought (and to finish the note attached to Creepy's note)
Per Directech's DirectWire:
Factory Alarm Disarm: Negative, Red/White to Gray, Drivers Kick or BCM Pin 7
Meter this wire while turning the key in the driver door key cylinder. This wire will also unlock the doors with a double pulse.
The BCM (Body Control Module) is to the right of the steering column.
Sounds like they just hooked it up to the OEM Unlock wire:
Lt Green to Purple, Negative, Drivers Kick or BCM Pin 45, The BCM (Body Control Module) is to the right of the steering column.
You could just move the unlock wire from your alarm to the disarm wire, and set the after market alarm for Double Pulse unlock and you'd be set... or have the shop that installed it move it there and do that for you since you paid for an install and what they did was an incomplete install
Edit> Forgot to mention, sounds like they tagged the OEM Alarm Arm wire for your "lock", as that will also lock the doors with a single pulse:
Factory Alarm Arm, Negative, Lt. Blue, Drivers kick or BCM Pin 8.
Meter this wire while turning the key in the driver door key cylinder. This wire will also lock the doors.
The BCM (Body Control Module) is to the right of the steering column.
So if they did tag the "lock" at the BCM and DID use the alarm wire, the disarm wire will be located right next to it.