Mirroring of the Map

Question from Lenas: Mirroring of the Map

I have a question for which I have not yet found an answer. If the world of Dreaming and the world of wakefulness are situated relative to each other like two pyramids joined at their apexes (I read this in one of Sergey Izrigi's letters + I encountered the same comparison at a trance seminar I once happened upon), then the world of Dreaming is a mirror reflection of this world. South and North are clear: South is at the top, North at the bottom. But then East should be on the right (!), not on the left of the map (I even deliberately looked at the map through a mirror to confirm). Then it would be a true mirror image, whereas otherwise, we're just turning the sheet 'upside down'. What's the point of turning it around like that? Wouldn't it be easier to simply lay it down with North at the top, making orientation easier?

I tried swapping East and West while leaving the objects on the map untouched. Incidentally, then many of them coincided in their real position and their orientation on the map. For instance, I used to place the sea in the east (both by general convention and purely intuitively), but after changing the directions, it appeared in its real place – in the west. The same applies to the village area. In reality, it's to my NE, and on the map, it now appeared exactly to the NE, whereas before it was to the NW. Oh, incidentally, I just remembered, Sergey Izrigi wrote that he used to perceive the passage to the SE as being to the SW, and then he moved it. But if you change the directions, it will indeed be to the SW.

So, please explain to me why the map started to be drawn with this particular orientation.

Follow-up from Wiwk

Wiwk: "There," I was 100% sure that a certain locality was in the north. Comparing the data (already "here"), I concluded that I was mistaken(?) – it's in the south. How do experienced Dream Hackers proceed in such cases? This question is for you.