For anyone following my previous lamp posting, I did get it figured out. Previous owner wired to the wrong lug on the Shoot Again lamp - the diode was completely out of the circuit.
But I found out this was only part of my problem.
My lamps on row 3 and row 6 seem to be tied together. For example when I test lamp 13, lamp 16 also comes on. When I test 16, 13 also comes on.
This is the case for 23/26, 33/36, 43/46, 53/56 etc.
When I unplug the molex from the light connection board underneath the mansion, the problem goes away. Plug it in and the problem is back. I figure this is telling me something, but I don't know what.
I don't know how to test it with a meter since I keep getting readings even from sockets that are not turned on. (Don't completely understand the way the matrix works either, obviously...)
Anyone that can help I would greatly appreciate it.
Thanks!
Chris