Why is there confusion about the numbering of the Ten Commandments?

Why is there a difference between the protestant Ten Commandments and the Catholic Ten Commandments? When did the protestants adopt their version of the Ten Commandments?

God Bless,

Zach

The Catholic Encyclopedia article Commandments explains that the confusion in the numbering of the commandments “is due to a difference of opinion concerning the initial precept on Divine worship”.

For more detailed explanations see:
The Division of the Ten Commandments
The True Ten Commandments

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