Where is Central Authority of Religion ?

Its the fate of every religion. Central authorities are only there when religion is new and its founder is round. As the main leader of the religion passes away.... Religion starts to deteriorate. New leaders of religions have their own interest so they start to mold its directions accordingly forming new religious sects.... This happened with all religions ...

You will not find any religion with only one group of people with same set of believes. Not a single one... But if you find one ... then follow that religion because God must be taking care after it :)