modern veloce are micro shift so it should have more than 2 clicks my suggestion would be to check there is nothing stuck in the ratchet.
remove the lever it is bolted to the bars via a torque bolt turn upside down the and you will have access to the ratchet mechanism be careful there is a spring which can ping off. They aren't overly complicated And unlike STI are easy to take apart and put back together providing you have a bit of experience with small spanners, you will need a decent pair of Snipe nose pliers and a 2.5(I think) hex key . there are couple of Campag videos on how to strip down and the tech docs on the campag site do contain some useful info in particular the exploded diagrams
http://www.campagnolo.com/UK/en
look under support videos and diagrams.
it took me 3 hours first time I stripped one down now its about 10 minutes to strip and reassemble, should have checked the videos in the first place.
