I had a Dolce triple a few years back and had trouble with shifting and chain falling off problems too. The LBS should have a little plastic add on called a chain stopper that at least stops the chain from falling into the inside. I also realized that even though you have all those gears does not mean you can use them all in any combination, well you can try but the chain falls off. Do some Google searches on chain shifting problems and see what you can find. I never did get the hang of a triple chainring. I now ride a compact double chainring and it seems much simpler. Don't give up with the Dolce, practice makes perfect. Oh, and congrats on the new bike