Team game with resources connencted to teammate HQ goes to them

Team games with resources, like water connected by "rail" to my teammate's HQ, were going to my teammate, even when I wasn't sharing water resources.  I got no blimps, and the water resource looked like it was connected to an HQ, which it kind of was to my teammate's, but, like I said, we weren't sharing, yet the other guy was getting the water.  The blimps started flowing again when my teammate got bought out.

This was a team game with the AI, who never shares, but I get that.  I was just trying out the sharing interface really, and then ended up playing a whole game.