Brad McGuire and Pat Meguire both are group administrators and both replied to my emails regarding the change in haplogroup.
It is not a mistake and represents new sub branches to established trees. More to follow as the smoke clears.
This is a genealogical blog seeking to find the origins of various lines of McCowns and spelling variants, both Scots and Irish. It was started because I am a McCown with predominately Maguire related DNA.