Go on... It sounds like you are learning.
So freaking what? We changed some things and kept a bunch of others. The definition of terms in the Constitution, as told to us by Framer Alexander Hamilton and by the US Supreme Court, is to be found in the English common law. "Natural born" means what it always meant.
We threw out the parts incompatible with Independent subjects , such as the feudal based law of Liege-Lord bondage as expressed in the Jus Soli principle.
Unfortunately, a bunch of English trained lawyers inadvertently brought it back.
As for the rest of it, for a while we denied our US citizens the right to expatriate just like the English did.
Resolved by statute sometime in the mid 19th century, but Many of the founders are on record as recognizing such a right. Probably it was those same English Trained lawyers who were mucking up the right of expatriation as well. It certainly sounds like their interpretation of the law.
We threw out liege-lord bondage. We didn't throw out the Jus Soli principle, which says simply that those born in a country are members of that country. Has nothing to do with servitude. Has to do with who is, and who isn't, a member of that particular country.