The Catholics use a different Bible: 6th is adultery, 7th is stealing.
That isn't about what Bible one uses. The text in Exodus is the same in Catholic, Protestant, and Orthodox Bibles; the only differences are in how to regard the so-called Deuterocanonical Books (often called "The Apocrypha" in Protestant sources), and "Deuterocanonical" versions or parts of some of the Protocanonical books (most notably Esther and Daniel).
The text in Exodus merely speaks of the "Ten Words" which were written on the two stone tablets, but doesn't provide specifics on how to specifically enumerate these "Ten Words". As such there are several ways of numbering the Decalogue, keeping it always the Decalogue because the text calls it "Ten Words" (Decalogue means, literally, "Ten Words"). There is a traditional Jewish numbering, St. Augustine gave a numbering of them, which is what Roman Catholics, Lutherans, and [some](?) Anglicans continue to use, John Calvin provided a new numbering scheme which is what most Protestants today still use, and then the Eastern Christian Churches have their own numbering system.
So, for example, since Lutherans use the Augustinian numbering system, the Lutheran Confessions summarize the 1st Commandment as "Thou shalt have no other gods" and the 2nd Commandment as "Thou shalt not take the name of the Lord thy God in vain". Thus the full text of the 1st Commandment, for Lutherans is:
"I am the LORD your God, who brought you out of the land of Egypt, out of the house of slavery. You shall have no other gods before Me. You shall not make for yourself a carved image, or any likeness of anything that is in heaven above, or that is in the earth beneath, or that is in the water under the earth. You shall not bow down to them or serve them, ... but showing steadfast love to thousands who love Me and keep My commandments." - Exodus 20:2-6
This is also the case for Roman Catholics, as can be seen in the
Catechism of the Catholic Church.
On the other hand, the traditional Jewish numbering has the 1st Commandment as "I am the Lord your God who brought you out of Egypt" and the 2nd Commandment is "You shall have no other gods before Me", and the 3rd is "Thou shalt not take the name of the Lord your God in vain".
While John Calvin, and most Protestants, have the 1st Commandment as "You shall have no other gods before Me" and the 2nd as "You shall not make for yourself a carved image, or any likeness of anything...", and the 3rd as "You shall not take the name of the Lord your God in vain".
It always adds up to being a Decalogue. So it's all the same commandments, it's just a matter of where Jews and Christians count 1, 2, 3, etc.
A common error I often see from some Protestants is the accusation that Catholcis have "removed the 2nd Commandment" because they simply don't know that they are using John Calvin's particular numbering system, while Catholics (and Lutherans, and Anglicans) are using the older Western Christian numbering system. And they often don't know this because no one ever told them, or they simply have never realized, that the Bible itself doesn't number the commandments, it simply tells us that there are "Ten Words". And readers have, in the millennia following, numbered them in different ways.
If one simply counts the "You shall" and "You shall nots", there are more than 10, so that alone wouldn't be an accurate way to number them. In order to get to a nice round 10 requires some level of arbitration. And, ultimately, such arbitration is hardly the point that matters in the Decalogue anyway.
-CryptoLutheran