Sounds like power is leaking from the Arduino. Do you have it hooked up to the computer at the same time? The Arduino is the only place I can see power coming from resulting in 2 volts on the other switch contacts.
The Arduino isn't / hasn't been connected at all...As for a 10k resistor, how would that be added, exactly?...and thanks for all your time and help again.
only to send a signal to a servo.