I don't see how that is very relevant to working out what is consistent with canon for GH books, especially ones published in the 1st ed AD&D era.Here is the D&D Astrology proficiency from the 2e PHB.
Do I take it that you really are claiming that it contradicts the folio/boxed set lore on heavenly bodies, presented in the voice of the sage, to have an order of wizards whose magical power waxes and wanes with the moons?
Maybe you could spell out the details of the contradiction?