If you have the newer oversized alumninum axle hub, there are no washers to be moved around. See page 13 of the linked PDF. There may be something wrong with the cassette body position relative to the right end of the axle, the cassette not mounted properly, some wrong spacers in the cassette. I measured my Campy hub with an 11 speed cassette and the end of the axle that bears against the frame only protrudes 1.5mm or about 1/16 inch beyond the face of the cassette lockring.

http://www.campagnolo.com/repository...0-B-010909.pdf