So if a single guy raped a virgin back then it wouldn't break the 7th commandment because adultery is defined as a "married" person having sex outside their marriage. Girls were raped all the time back then with no consequences I'm sure.
Capital punishment is administered if you are found guilty. Many stonings happened without due process in that time.
I beg to differ. And there was due process in that time. You had the elders and judges of Israel, who facilitated such a process. And, at least two witnesses were required for a conviction.
Plus, your definition of adultery is a bit off. An adulterer/adulteress can be single if he/she is screwing someone who's married. For example, Reille Hunter is considered an adulteress, not because she is married, but because John Edwards is married.
If a single guy raped a virgin, bethrothed to another man, he is committing adultery. But, since the girl is forced, only the guy gets put to death. Nothing happens to the woman.
Here's another: slavery. Not part of the 10 commandments.
That's also covered under the laws that are a subset of the Commandments. To be clear, what we typically think of when we hear slavery (i.e. chattel slavery) was specifically outlawed. Kidnapping people and selling them was punishable by death. If Israel went to war against an enemy, it could assimilate its people. But, even that had guidelines and harsh treatment of servants was specifically barred, as the Israelites were repeatedly reminded of how badly they were treated in Egypt.
Or we just no longer follow that part of the Bible stupidity.
There's nothing stupid about that, especially given the ramifications adultery had, during that time: Destruction of the nuclear family, which affected inheritance rights. Shame and dishonor that came to the family, not to mention little things such as DISEASE and pestilence, spread due to adulterous behavior.