Thanks again to everyone for all of your help.
All of your questions/assumptions are correct.
I am using a digital volt meter (it is a Fluke 88) to test the continuity between the ground leg at the outlet and the ground bus of the sub-panel.
My only two concerns were:
1 (and most...
The tester is an A.W. Sperry CA-300A. It is just a little handheld tool with three lights on it. I doubt it is a problem with the tester since one room does not have the problem. I would expect all rooms to show a problem if it was the tester. Is there anyway I can test this with a meter...
I am rewiring my old house (35+ years old) that had non-grounded aluminum wiring (very dangerous!) with good ol' copper/grounded wiring. I have four rooms done and in each room I have put in wall outlets that go to a switch by the door. When I finished the rooms, I used my circuit tester to...