Berry Family genetic distances

Here's an opportunity to find yourself on this table and determine your genetic distance from any other member of the Project -Pretty much straightforward, EXCEPT  --  look at how the Faires Berrys, the Rockingham Co. Berrys, the Barry/Berrys, the Spartanburg Co., SC Berrys, together with Robert, #43, Lawrence, #61, and Gerald, #64, all seem to form sort of an amorphous grouping?    Variously seemingly interrelated and not?What does anyone think that means?    I don't know.