> and is stll bound by the lower courts decision because SCOTUS only remanded the case back to a lower court.

Wrong, they are not bound by the lower court decision, because the Supreme Court vacated the judgement and remanded the case for further consideration in light of the SCOTUS ruling in Masterpiece Cakeshop (as stated in the order linked from the source you linked), because that decision set relevant precedent which the lower court did not consider in its judgement (for timing reasons, as the lower court decision predates Masterpiece Cakeshop, I believe.)