Thanks for the tip. I just tried it again now, still no luck. When I go split the room, you can see the interior wall turns a dark color instead of light green. It is almost like the map is treating me interior wall like an obstacle instead of a wall. I can only run the room split between two sections of the light green walls.
The wall does not appear that color when viewing the map, just in editing mode.
All I need to do is run the room split straight cross the doorway where I have the right anchor situation, but it just won’t let me