If your dome lights are going out when you close the doors, if you have them on, then it shouldn't be the door switches.
My 2014 has the interior lights switch either, off, on or door, I can't remember what my 2005 had.
The truck won't 'beep' when locking or unlocking from the door switch, only from the remote.
My 2014 has an aftermarket remote start/alarm, but I think the stock remote beeps once when locking, beeps twice when unlocking.
My aftermarket beeps once when locking, gives me a short horn honk if I lock it again.
Beeps twice on unlock no matter how many times I it it.
Try taking a pic of the remote when you have time.
Some aftermarkets can use the OEM remote, some of them can't.
If you can't get this solved, you'll need to take
suggestion and look up under the dash for an aftermarket alarm.