I found the same thing! According to what a late uncle had told me, I should be 1/16th Cherokee - it was zero.
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Much “Native American” shows up as Mediterranean/North African as the Egyptians and Phoenicians had large encampments in the Americas during the “bronze age” ... Of course this includes the Israeli tribes too as they were part of the Egyptian empire for many years and are indistinguishable from them... Modern Egyptians are darker skinned and have DNA mixed with more African peoples.
That’s interesting, I might go back and review my results.