The didache was pre-vatican, pre-pope, early apostollic father, it was written between 50 AD to 150 AD it was pre canno0n of scripture before the Gospels and epistles were published as a book the Didache was used -- in Churches as a guide for new beleivers. It has nothing to do with what the catholic church decided and made up later.
Bishop Fulton Sheen said, "There are not 100 people in the United States who hate the Catholic Church. There are however, millions who hate what they think is the Catholic Church."
http://www.davidmacd.com/catholic/index2.htm