multi tester showing 10 volts on in active wire
Do-de-do-doo....

The spooky 10V you are seeing is a "ghost" or "phantom" voltage, capacitively coupled from the hot wire, that your meter can measure due to the meter's high impedance, but can't do anything as it has no current (energy) behind it.  Some modern meters have a "LoZ" function on them that lowers the input impedance to get rid of these phantom voltages.