Hi my name Rien, and I am new here just installing my Pi and it seems working. I see positions of planes. But when i look at the Feeder points in my area, I see that my point is not at the same position as the position where I see the plane map??? I live in Region 4A
As mentioned on the page, it snaps to a grid / has an offset so it doesn't show exact positions. As long as your sync is good, don't worry about it.
As mentioned on the page .... it's offset on purpose. (or to be more precise it snaps to a grid to keep the exact location private)