Whats your point exactly? That they did not have clearly defined borders with a map? That they dont have clearly defined property borders? Where do you base these assumptions on?

In dnd they do have armies who maintain there borders and border conflict happens all the time. Some nations are marred with borders conflicts between them and their neighbours. One region's basic premise (border kingdoms) is that its borders basicly change by the day. Why would that make the region special if it happened everywhere?

Agree that Kahga's situation is silly. But borders have nothing to do with it