After my last post I reread the linked article and realized we are dealing with three different situations and therefore come up with three different answers. The author of the article discusses the MRCA(Eve) and the purely matrinineal line followed to get back to her. She then discusses the MRCA(Adam) and the purely patrilineal line followed to get back to him. She then makes the incorrect connection that these two individuals are the MRCA's of all living humans. That is a different question all together and one that can't be addressed using the methods at hand.

At the end of the day I think we are all actually in agreement and terminoligy got in the way.