sleep/wake button stuck- AGAIN

I gave my daughter an ipod nano 6th gen for her birthday in may 2011. by April 2012 the sleep/wake button was stuck and we went to store for service. we were given a new nano. now (about 11 months again) the new one is experiencing the same problem, but the online system indicates we have no warranty or service suppor recourse. Are these supposed to be this way? we have several apple products in our home and have never had such a frustrating problem before.