If no tribes are listed, isn't that rather far from accuracy ? On my family tree is traced back to the Patawomeck indians. They were even present at a family reunion I attended. However, i did not score any NA on this test or 23Andme. I did get some on Gedmatch, but only 2%.
As far as the Jewish question, some people with known Cherokee heritage did not get NA on the test, but did get Ashkenazi Jewish. It's just a question. I never said they were the lost tribe. People need not be so sensitive. There is some speculation about possible MENA influence in Cherokee Indians.