Thanks for the bump. I can tell you that I did the wiring as any standard Jazz would have it- pups in parallel, like this:

I am sure I haven't done anything wrong. And I know that this setup will do this to a degree no matter what. It's just a lot more than I'm used to, with the Fat Stacks. Probably due to the impedance of these pickups, whatever. I've heard there is a way to minimize the effect, that's what I'm looking for, I think. Thanks again, Dave