But they still went back and were in further deliberation, having never made an official acquittal, as was the MAJORITY opinion. They were then dismissed.
All of the jurors were never questioned as to guilty or not guilty and never signed off on any verdict.
Do you think if any jury foreman states in any open court not guilty that should just be the end of it, regardless of any other circumstances?
Did you even read the majority opinion? The constitution was given short shrift by Roberts and his whole decision relied on his own personal opinion of what constitutes a "verdict". Sotomayor wrote a classic argument for the original intent of the constitution. Sotomayor argued for the Constitution. Roberts argued for some form of procedural correctness and ignored the words of the constitution.
Read both opinions and then ask yourself which opinion sounded like it was written by a Justice who believes in Original intent.