Subject: Re: Help Wanted: Constitutional Grammarian
This implies that there are Officers whose appointments are provided for by the Constitution. The President is one of those.

Quite the contrary. The Clause says that all Officers whose Appointments are not herein otherwise provided for are to be appointed by the President. The President is not appointed, and he certainly cannot appoint himself.

The Clause implies that "Officers" are people that are appointed to their position by the President or people the President has appointed. Which the President is not.