Alarm goes off when arming and exiting the house

I just set up my ring alarm over the weekend. Everytime I arm it, when I open the door to leave, the alarm goes off. If I have the door open already, it says the alarm will arm with the door disabled. Isn’t it supposed to give me a window to get out? I know I can arm from my phone once I’m out of the house, but I want both options. Do I arm with the door open or closed? Thanks.

https://support.ring.com/hc/en-us/articles/360030784072-Setting-Ring-Alarm-Entry-and-Exit-Delays
You’ll need to set your door sensor to main door first. If you want a motion detector to delay as well, you’ll need to reconfigure it as well.

To change the sensor to main doorway.
Menu, settings, alarm base, choose sensor, then gear on top right, placement. Change it to main door.

To change a motion sensor to entryway.
Menu, settings, alarm base, choose motion sensor, gear on top right, placement. Change to entry way.