The "Murphy + sofabed" setup would be highly unusual. Zero real beds in the room? I suppose it's possible...it'd probably be the anteroom of a larger suite that maybe they sell individually as a day room. Just seems unlikely.

I think the OP will get a King and a Murphy, it'll be a decent room, and he'll get $100 as well. If the hotel really does have generally good customer service (aside for the curt emails), then this will hopefully happen without a fuss.