Colnago Arte Road Bike

I bought 2 of these for my wife and I for climbing the hills. Over all we are very happy about the purchase besides:[...] 2)The "qualified bicycle mechanics" who put these bike together and fill the inspection sheet should be fired right away. My wife's bike develop a strange noise when we ride the bike first time after I assemble and adjust the bikes. We stopped and can not see where the noise is coming from so we finished our ride early and head back. I discovered both rear derailleur hanger screws are loose and one of them is scratching on the cassette after I remove the rear wheel. So I recheck all the bolts and screws and found lots of them are way too loose.The paint job is first class and these bikes are very fast and handle well. silky smooth shifting after the adjustment (Both rear derailleurs were set too far out).