The power door locks keep unlocking even after being locked from the outside with the FOB.

test for power and ground at the non-working actuators. If they're getting power and ground when you activate the door locks, the actuators are bad. Keep in mind that they all work the same number of cycles, so it's no unusual for multiple actuators to fail at the same time.

Door Locking / Unlocking Problem - Kia Forum

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there are 3 ways to lock.
key metal
on door switches
and the FOB, RKE.

so is this a fob question? key fob? only failure???????
did you know that many fob modes are PROgrammable?
the operators guide tells you how to do that.
did you try both fobs, that came with car new., if not why not?
did you replace the 8 year old fob batteries, no , why not now.?

on my 08 (for example) :
can program it to only open drivers door. or all.
and autolock feature off or on.

on my other car all was worked fine. then drives door failed
to open (all 3 fobs fail, one is new) the door solenoid was bad.
$100 part. now fixed, by me.
so do all fobs fail. if in fact this is a FOB question
RKE (called remote key entry by jeep)

i have 4 fobs for my jeep now. you must have 2 good keys.
to make a 3rd by self.
so keep 2 , never ever used. to be self sufficient.
this is not a door issue, above 3 lines, its a not getting stranded issue.

Check the body control module. All the locks go through it.

This is because your master switch on the drivers door may have corroded oxidation on the contacts inside the switch and that master switch is the feed for all inside door lock switches your remote and keypad work because those electrical signals go through the driver door module you must clean all contacts on the master switch get them shiny you can use 4/0 steel wool and alcohol and also take the lock switch apart and clean the button contacts inside the switch for this use alcohol and 1000 grit sandpaper glued to a pencil and lightly spin in your fingers to shine the contacts sometimes just an eraser works but it depends on the quality of it so go with the sandpaper glued to the pencil or any circular object that will fit inside after this blow out the switch and use the alcohol to clean out and let dry

a. When you lock the doors (with the Switch) with you inside... do they stay locked?
b. Do your Doors lock automatically when you put it in gear?

Have you tried using a Different FOB (Remote). If one Remote works properly and One Unlocks the Doors after locking... you have a Defective (FOB) Remote

This worked for me on 2008 Mk5 Golf, after the rear passenger door would not open fro outside or inside.

Hold the inside door latch open and keep it extended, then with the key fob open and close the door locks (still holding the inside latch open). Keep locking and unlocking the door, then it made a kluck and it released.

You might have a stuck door lock relay or door lock switch. I would check the relay first, look in your owners manual for location.

If that doesn't do it, unplug the door lock switches, and see if one of them is faulty. If the switches have gotten wet, that is probalbly the problem.

One other thing to try is remove the batteries from your remotes, one might be sending a signal to the car.

Hi:
The most likely cause of this is the power door lock control module. You can locate the fuse for the power door locks and pull that, to keep your durango secure. I am not 100% sure , but I think the module is located inside the drivers door.

Using a multimeter, check for voltage at the lock/unlock solenoid. Disconnect the connector and probe the unlock side with the other lead on a good ground. Hit the unlock twice and see if you get voltage. If yes, the solenoid may be defective or if not, you could possibly have a bad relay. Even though you can hear the relay, that doesn't necessarily mean it's completing the circuit. My car did the same thing and I ended up replacing the relay.
The lock side check would be the same.

Hope this helps!