Henry VI's line was wiped out by the Yorks in 1471 and Henry VI wasn't anybody's grandfather (or even father likely since his wife gave birth while he was in a catatonic state)

That historical fact is what makes me think that Meghan edited or had final say in all of this.

You cannot tell me that Harry wasn't schooled, at least in some part, on his royal lineage and to which houses he is actually related to.

Harry line of succession has more German royal blood in it than Plantagenet thanks to Victoria and Albert. His Great-Grandfather George V changed the fam name from Saxe-Coburg and Gotha to Windsor during WWI because it was German.