In the report, Facebook said that monthly audience of social networks by the end of June 2012 amounted to 955 million users. Of these, about 4.8 percent are duplicate accounts, that is created by users already registered in the social network.
In my opinion these accounts more as a person always creates an additional profile for different purposes. For example for the administration of groups and communities. For the presentation of business in social networks, etc. Plus a boats that perform huskies. Though the creation of more than one page rules prohibit Facebook!