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.