It was my understanding that all the U.S. Supreme did was to, in effect, tell the Florida Supreme to stay out of the legislating business, by telling them they could not over rule the Florida legislature.
I'm not trying to start an argument with you and am ready to admit that I could be wrong.
They did much more than that.
But even if you were right, they usurped the role of Congress in counting the electoral votes.
Under Article II, the state legislatures solely make the rules for appointing electors. Under Amendment XI, the electoral votes are counted publicly by both Houses of Congress in a special session.
It has happened before that there have been competing slates of electors from a state. This is a political question, not a judicial one. It is supposed to be resolved by Congress, not by the Supreme Court.
Congress should have and would have dealt with this matter in January, 2001.