Correct, the only doors that will open are ones that are created when adding two rooms together. I have not been able to make a door open when adding it to a pre built map. just double click the green conjoined area and select a door on the drop down list. Also, I noticed in your images, that you have a failure text but no…
That is pretty much exactly how I set mine up, i was wondering if I was missing something.. But i guess a lot of the who creation process is just being as creative as possible with what you want to do.