correct. in the bazzfuss and most effects the volume pot will be wired so volume 1 goes to ground, volume 3 is connected to signal on the board, and volume 2 is the output to the switch. in the layout you provided volume 3 is not wired to ground but to the output cap.
yea that happens. you can actually put lug 3 on ground and lug 1 to the output signal on the board, and keep lug 2 to the output switch. if you did that the only thing that will happen is that you're volume pot will work backwards.