Only question is whether you were standing in the same spot, preferably ears at the same height for thump thump thump and THUMP THUMP THUMP.
If so, smile & be happy, your phase journey is probably complete. I guess it's possible that this could be the right phase setting for just that one particular frequency but I don't *think* it works that way.
If not... um... smile and be happy, you got to spend the afternoon listening to great music on a great system, and you still have the phase journey ahead of you
[EDIT] One other thing to remember -- you probably won't hear any difference flipping the phase switch while you are standing beside the sub. You have to be in your normal listening position and either have someone else flip the switch or get real good at poking the switch with a long stick.
