Why when I create additional landscape in world composition it doesnt load next to selected landscape?

When I had the landscape on the upper right selected, i selected to create an adjacent landscape but the new(selected in picture) is loaded here. It doesn’t happen all the time but it is a persistent problem. I could be up to 9 maps and new maps will be created in the same spot. What is causing this? It shows the landscape in the editor at the same spot.

In this image I saved the levels and restarted the project and once i reloaded all levels, the landscape that was originally generated in the wrong spot is reloaded to the spot it was suppose to be.(when i first open WC it looks like the original image)