Has anyone attempted a unified numbering of Ten Commandments?
This has, I believe, never been really seriously attempted because of the various ways in which Christians interpret the Sacred Scriptures.
Different religious traditions will categorize the seventeen verses of Exodus 20:1–17 and their parallels in Deuteronomy 5:4–21 into ten commandments in different ways. Some scholars suggest that the number ten is simply a choice to aid memorization rather than a matter of theology.
The diverse Christian traditions are too far apart to have an unified common numbering of the Ten Commandments.
The Division of the Ten Commandments
One dispute concerning the Ten Commandments concerns how they are to be divided. We are told in Scripture that there are ten of them (Exodus 34:28, Deuteronomy 4:13, 10:4), but we are not told exactly how the text should be divided.
This is a problem because there are actually more than ten imperative statements in the two relevant texts (Exodus 20:1-17, Deuteronomy 5:6-21). Here is a count of them based on Exodus 20:
1 You shall have no other gods before me.
2 You shall not make for yourself a graven image...
3 You shall not bow down to them or serve them...
4 You shall not take the name of the LORD your God in vain...
5 Remember the Sabbath day, to keep it holy.
6 Six days you shall labor...
7 In it [the seventh day] you shall not do any work...
8 Honor your father and your mother...
9 You shall not kill.
10 You shall not commit adultery.
11 You shall not steal.
12 You shall not bear false witness against your
13 You shall not covet your neighbor's house
14 You shall not covet your neighbor's wife...
Obviously, in order to get these to total ten commandments, some imperative statements must be grouped together. Fortunately, most of the groupings are obvious, but there are still two groupings which are disputed. There is also one other issue complicating matters. The passages which refer to the Ten Commandments, do indeed specify that there are “ten” of them, but they don't actually say that they are “commandments”. - The Division of the Ten Commandments