The Stanley Parable: Confusion ending

I'm not so sure that's the ending.

The schedule says that after the restart, the player is supposed to find the yellow line again, but be unable to play (paraphrasing here).

After seeing the schedule, I've found the yellow line, but I can't get to it.

After seeing the schedule, the narrator restarts the game. Head through the "door on the right". On your right There is an office with a window and no marking on the door. Through that window you can see the yellow line starting (or ending?) in that office. If you look into the office anytime before seeing the Confusion Ending Schedule, the yellow line is not there. The door to the office is locked.