All most 3 years ago a sibling to get me back into our genealogy, paid for a year’s subscription and my DNA test with the big mother of genealogy.
At that time I had 6% African DNA and that sibling had 4% and one of her adult off spring had 3% and grand kids had 2%. All of the so called African DNA came from the geographical and tribal areas for all of our 3 generations.
In a couple of years, I added over 15k ancestors, and my African DNA dropped to 3% due to the predominant % of snowflake ancestors. My sibling dropped to 2%, and her adult child stayed at 3% and grand kids stayed at 2%.
A year later, my ancestor count is 29 k, and my African DNA has dropped to 3% with all of the snowflake ancestors added.
My sibling no longer has the same geographical/tribal area, and she has stayed at 2% African DNA, but from a different Gene pool. An area south of where my DNA came from and where her DNA used to come from.
Her daughter and grand kids still have the original African DNA pool that I have and the same %. They don’t have the same DNA pool that their grandmother/mother/and I have.
If the above doesn’t give one a DNA headache, try this puzzle.
I have over 150 documented Cherokee Indian and/or their cousins documented in weddings, births and other paper documentation showing American Indian ancestry and zero American Indian DNA. Neither does my sibling, her daughter and grand kids have any American Indian DNA in their trees.
So this DNA thing in certain ancestral areas is not an exact science.
On that same note:
A co-worker did a DNA test, like you did. Posted the results, and some relatives came up on his chart. Additionally, so did one man who had no relational connections at all. This man contacted the co-worker to try and find out what their shared heritage could possibly be. They were not even in the same state or region.
But during the conversation, they found that they had lived in the same city when they were little children. Then came to find out the co-workers father worked in the same business as the unidentified males mother. This led to some interesting conversations about childhood play areas. Which finally led to the idea that someones dad had made friends with someones mom.
It still hasn’t totally played out yet because they are being extra careful with the information. Certain people are still alive.