Re: electrical switch
A single pole switch basically shorts the two wires together or disconnects them. It doesn't matter which screw which wire goes on. A 3-way can be used as a single pole switch and preform the same function. It would appear you have not furnished us with all the pertinent information. Disconnect one of the wires from the switch and turn on the power. If the light is still on then it is not the switch.
Originally Posted by susieski
Be sure you live your life, because you are a long time dead.-Scottish Proverb