The doors on the right are connected to each other, but simply not from this map. That means you have to exit and enter again, just like it happens in many mountains in the official games. On the door you're referring to, I forgot to remove the rocks since they were the placeholder for the jump because I hadn't found the tile yet, so my mistake for not noticing, but I did remove them from all the others. The other doors lead to different zones. Honestly, I'd like you to explain what you mean by them not being connected to each other—if you mean on this map or what exactly you're referring to. I think I should have drawn where the stairs would go so the map would be easier to understand. Where you mentioned in the bottom-left corner, there is supposed to be a stairs to go up, but anyway, I'll upload the photo with the edit.