The difference in current between hot and neutral is not important in a 120 volt circuit (current in = current out). If you suspect leakage to ground check with a megger or put circuit on gfi and see if it trips. They trip at 6ma which most meters can't read accurately. All components (including caps) of an energized circuit have magnetic fields unless they are sheilded. Cheap, and non Rms meters can not be counted on to be totally accurate, and will pick up readings from these fields. You can peg many analog meters just by transmitting on a 900 mhz walkie talkie, even if the meter is shut off. The voltage reading between the neutral and the ground is created by the voltage drop in the neutral wire going back to the panel where it is bonded to the ground. This voltage drop will increase as the load increases. There is no voltage drop on the ground since there is no current flow. This is how inspectors test new wiring to see if it is within the 3% or 5% NEC rules when VD is critical. AirMechanical is right, don't waste your time on duplicate or non important readings. If you have excessive low voltage at the load though, neutral/hot to ground readings can be important, otherwise don't bother.