It looks like you added a reverse inflation layer to the mesh that I did not have. That is not mentioned in the validation documentation. It appears to be done to get the surface cell to be around y+30 and to make the surface mesh more even.
Exactly, as announced in my long post above, I worked to get that new mesh satisfy the y+ criterion. And if you have a look at the validation page now, you will see the updated results and a more detailed explanation.