“first of all your statement that there are four “expert” genealogists from ancestry who said that is false.”
Looks like four to me, if you look at the research document.
From the pdf:
“Documenting President Barack Obama’s Maternal African-American Ancestry: Tracing His Mother’s Bunch Ancestry to the First Slave in America
“By Anastasia Harman, Ancestry.com Lead Family Historian, Natalie D. Cottrill, MA, Paul C. Reed, FASG, and Joseph Shumway, AG”