I am replacing a bathroom switch that has two toggle switches one on top of the other. The top switch failed witch meant that i could not turn the fan off. By the way there is in addition to the fan, a heat lamp, and a regular bulb next to it on the ceiling. So i bought another switch hooked the wires up to it exactly as the old switch. Now the top switch turns on not only the fan but also the heat lamp and the regular bulb next to it. The bottom switch doesn't do anything! Whats the deal?