remote starter activating alarm

OK Guys, I bought a Ford Expedition last year that already had an Aftermarket Alarm system on it with the Remote Starter. When I initially bought the truck - everything was working as it was supposed too.

However I now noticed that when I engage the remote starter option the truck turns on and runs it's designated time on the remote starter then when the times up, it shuts the truck down (like it's supposed to) but it also engages  the Alarm system. So now I have the truck Alarm going off at 5am in the morning - NOT COOL!

Now there is a way to bypass the alarm going off and that is to unlock/disengage the alarm system before I remote start the truck. BUT the issue with that is that it leaves the truck unlocked and available for anyone to sneek into the truck without anyone noticing and when my wife is driving the truck, this does not sit too well with me.

Anyone have any idea - What could be setting off the Alarm once the Remote Starter shuts down???

TIA for the Help

All I know at this time is that it's an Automate Alarm/Remote Starter.

And Unfortunately, I'm not driving the truck today in order to look under the dash for the brain.