Home receptacles measure from 24 to 96 volts
DVM's have a problem.  Unlike traditional voltmeters which use a tiny amount of current from the circuit to move the needle in the meter, DVM's are self-powered and draw essentially no current.  

If you lay two wires in parallel and energize one, the floating, unattached wire will "pick up" a voltage by induction (well, capacitance).  This is useless and there's no force behind it (if it wasn't, everyone who lived near high-tension lines would pirate power by laying wires alongside).   You won't see that power on an analog meter, because there's not even enough current to move the gauge needle.

So when you measure a circuit with a DVM, you never know what you're looking at.  It might be real live power or it might be this phantom.  

When this happens, put any load on the circuit such as a night-light or a 3-lamp circuit tester, and measure again.