I am a amazon customer since Aug2010 but i never had this kind of experience that my account is charged several times in a month and same product is dumped into my home.When check with the customer care they are saying i might hit the button several times so my subscription duplicated and hence i am receiving the same product multiple time.I don't know how it is possible.Finally i am able to cancel my account.So be care full when you are subscribing and check you account(credit/debit) attached to the subscription frequently.