your questions regarding the game rules (improving the interpretation).

And now a question: what is the reason for exactly 2 cells on the left, why not on the right?

Because that is the shortest path to this ГО on foot. The General Rule for breaking through such a ГО is written for situations without control. Using DD - you can jump to the cell to the right of the efreets. And with flight/wings - one should move along the shortest path within their own respawn - in this case, via the snow cells that are blocked by gold dragons.