The electors are selected in the manner prescribed by the state legislatures - with no say by the Governor or SoS or any other official or judge (which is what rendered the elections in several states unconstitutional). The collective of the all the electors from all the states is the Electoral College. Today is the official day for the electors to vote in their individual states. The votes are counted in a joint session of Congress next month.
So I interpret your post to mean that according to the constitution all the electors must cast their votes today, but since there are multiple slates casting, the conflict has to be resolved at the congressional level. But any states that want to send competing electors must do so today. And you are saying that which slate of the two is the official slate, is not up to the SOS or Gov to decide.
Did I get that right?
If so, do the legislatures need to weigh in at all at this point? Do they still have a role?