Does anyone know exactly how automated carts work? Not to be confused with choosing the "automated trade route" option for carts. In a multiplayer game, I was Adams and my friend was Washington. After building a few carts, and setting the imports and exports correctly, I noticed my carts, automated but with no routes set, were exporting goods to my friend's cities that were importing goods. Does this happen only because we were both English leaders? Is there any way to prevent it other than giving all your carts specific routes?