Perhaps they had yet to actually lock it? Seems a bit strange considering their obvious concern with safety, but... *shrug*
Your leaving to save Glenn was accomplished by going out the back door (in the office) and down the rear alley. This is evidenced by the animation showing Lee and Irene heading to the office door once deciding it's time to save Glenn.
"We will never be an advanced civilization as long as rain showers can delay the launching of a space rocket." ~George Carlin
I am neither in TTG's employ, nor a forum moderator. I am just a regular member like anyone else, and my opinions are my own.
However, I do tend to be very vocal about those opinions. Get over it.