"" I agree, swapping the field wires should make no difference if the alternator is working correctly.""

I think that "WORKING CORRECTLY" is the key.

I witnessed what the test machine had the operator change to make the alternator test correctly. Since the alternator tested good after the field wire swap on the machine, I am assuming that since I have already swapped the field wires (temporary jumpers) that the next time I start up the engine, the ammeter/battery volt gauge may not show the bouncing issue.