Graphical representation of the Great Wall

Hello, I would like to ask a question regarding the visual representation of the Great Wall.

In my current game, as the Assyrians, I have Brazil as my neighbors. After deciding to take them on, I planted a city right next to their borders, for easier conquest purposes. Right when I was about to take his capital, he goes and builds the Great Wall. The turn after I take the capital, the wall, as you will see in the screenshot, surrounded my second city (Nineveh) as well. Is this normal, or a bug? (The screenshot is taken several turns after taking the capital)

http://img201.imageshack.us/img201/5228/3fhx.jpg

 

That seems like a bug. I have always thought the great wall was supposed to surround the borders of a civ on the turn it is built and never change from there.

 

It is not really a bug, but yes, the Great Wall expands as far as a city can spread its borders (5-6 tiles from the city itself).

 

I don't quite understand why the GW didn't go around his second city as well. Sao Paulo is located 5 tiles away from Rio De Janeiro, exactly like my Nineveh.

 

Because it only outlines territory held by the person who controls the wall. If you capture Sao Paulo it will expand around it.

 

Reloading your save will refresh where the GW is drawn, although it never seems to surround the entire civ's boundaries.

 

Exactly. So, when he built it, it should have gone to Rio De Janeiro. I am 100% sure that wasn't the case. I just remember that when I captured his capital 2 turns after he built the GW, it outlined my city. In any case, thank you for the replies, everyone!