I seriously doubt the congress intended to make the children of US diplomats stationed overseas ineligible to run for President. If that were the case, there would have been quite a bit of difficulty in getting people to fill those jobs. According to both the 1790 and 1795 acts, the children are born as citizens of the United States not of foreign countries and not naturalized citizens.
The 1790 act was poorly written. It include provisions for citizenship only for “free white persons with good moral character.” It was overwritten by the 1795 act, which dumped the “natural born” and “white” wording. Don’t confuse being a citizen with what the framers had in mind for being eligible for POTUS. “Natural Born” is/was a purity test for only one job. Our glorius founders didn’t want any divided loyalty for that job. Obama was born a British citizen. George Washington and Ben Franklin et all wouldn’t be happy.