In the Federal court system of the US, the Supreme Court is the top court.
That is NOT the case in all court systems, though. In the New York State courts, for instance, the Supreme Courts are the trial courts. They are below the Supreme Court, Appellate Dicision, which is below the Court of Appeals.
Thus, your argument that a court must be the top court because it has Supreme in its name is faulty.
Your implicit (and somewhat rude) argument was that D9u should have known the Supreme Court of the US is the top court because it is named the "Supreme" court.
The New York courts are relevant because they provide a counterexample that refutes your argument. You owe D9u an apology.
You happened to be right in your conclusion that the Supreme Court of the US is the top US court, but that is only because you already knew that and tried to construct your argument backward from the conclusion.
That is NOT the case in all court systems, though. In the New York State courts, for instance, the Supreme Courts are the trial courts. They are below the Supreme Court, Appellate Dicision, which is below the Court of Appeals.
Thus, your argument that a court must be the top court because it has Supreme in its name is faulty.