I see where the mistake was made with that switch. It's not your fault. You followed the diagram properly, and it should have worked. That switch is just goofy. Normally the switch has a hot side with the tabs in a "W" shape, and a ground on the other side. That switch has the ground in between the inputs for the leads, and the outputs come together isolated on the other side. I only figured it out by looking at the switch itself in the photo, basically locating where the tabs come out to figure out what is what. It's really the switch's fault.