It's believed that Coop in the beginning of the season is chronologically in the future. When the Arm's doppelganger sends Cooper hurling through space, he ends up in the box/room with Naido, the eyeless woman from this episode.
Naido guides Coop to the ladder, and on the way there, Coop sees the vault-like object that would eventually become his exit from the Lodge. At this point, however, there's a lot of electronic distortion in the space, and the box, which has the number 15 on it, repeals Coop when he goes near it. At that point, Naido heads up with the ladder with Coop, de-electrifies the box by holding the bulb and then gets ejected into space. Cooper returns back into the box, and the distortion is gone, and the American Woman has replaced Naido. The vault-like box now has the number 3 on it, and Cooper enters it once the Woman tells Coop to hurry because Mother is coming. This dumps Cooper out into the real world...
Coop enters the vault with the #3 and exits in Episode 3, and so, the theory was born that #15 was for Episode 15. This time gap explained, to an extent, why DougieCoop was somewhat mentally stifled since he is currently a man out of sync with time.
When Naido is ejected, we have no clue where she goes. Now, we learned that she was dumped out in Episode 14. That, to me, supports the theory that, at minimum, the events in the Lodge at the start of the season were occurring in the future.