I've had this issue. Two Ford dealerships told me nothing was wrong. So I went home, put a 2 gallon gas can in my trunk and drove around until I ran out of gas. Disconnected the NEG battery terminal for 15 minutes, then reconnected it. The gauge showed empty as it should have. Put in the two gallons of gas, drove to a service station and filled up.
Haven't had the issue since then. Maybe the fuel gauge's initial self calibration got screwed up or something. But having done this, it works fine now. I told the two Ford dealerships about it and they've had success with doing it to at least one other car. So might be worth a shot.
But it does worry me the TSB says it could be an intermittent problem. But it happened for a week straight and it's now been two weeks since I did that reset procedure and it's not happened again. Not yet anyway.
Thank you for posting this though. I'm keeping a copy so I can print it out and take to the dealerships and see if they've gotten it yet.