Leaving while in home mode

What am I supposed to do if I am currently in home mode and want to leave. I would like the system to remain in home mode. I was in home mode and I entered my code and pressed the home mode. I opened my front door and closed it. I assumed this would work and not trip the alarm but my alarm ended up going off. Please help. **Edit:** To clarify, I'm looking for a delay exit when in home mode. The use case is I'm leaving for work but want to leave the system in home mode because there are still people in the house.