RNC says that the one elector in Texas is the only faithless elector they're aware of. So are 19 GOP electors just lying to the RNC?
Will we actually know the results of the EC vote on Monday or do we have to wait until January? Supposedly there isn't anything to stop the electors from telling people how they voted even before the votes are officially opened in Congress?
We'll know on Monday. Some states have a secret ballot for their electors, but the results will be reported immediately. Congress counting the votes is basically just a rubber stamp on the results. (Conceivably, if some votes' legitimacy were in doubt, Congress could decide not to count those.)