I'm shocked! I discovered today that Catholics number the 10 commandments differently from the C of E (and probably everyone else!)
In the 'Catholic' commandments, number 4 is "Honour thy father and thy mother". I told my Vicar I'd broken the 4th commandment, he assumed I meant keeping the Sabbath day holy, and we had a very confused conversation until we figured out the differences!
Anyone else come across this?