It's really not hard to center a Phil BB, but OK.

Judging by the clearance issues you're having and how far out your drive-side cup needs to be for the spider to clear your chainstay, a fixed-cup Campy BB probably won't fix your problem because that crankset likely isn't compatible with that frame. Those KHS frames are notorious for having clearance issues with a lot of cranksets because the stays are fat and not dimpled.

At any rate, I'm pretty sure you're mixing a JIS crankset with an ISO spindle when it comes to your Miche setup.

I added a pic to my post above. If you are certain your crank arms are JIS and your BB doesn't look like the pic, you have the wrong one.