Old Maps not updating when new maps created

I had a current map that I created that worked just fine until I created a new map in a new area. when I created the new map, if I walked back into the area of the old map, it would not update the cursor. I reloaded the world and it worked just fine, but this will happen everytime you create a new map. (note that when I say map I mean in-game map, not world maps)