Other Fuel System Tank Assembly problems of the 2017 Ford Explorer

Fuel tank leak. Heavy odor of gasoline when tank full. Independent mechanic checked for cause and observed residue around the tank where gasoline had escaped from top of tank. Ford dealership did a diagnosis and subsequent repair, finding that gasket, on top of the tank at the sending unit/fuel pump had cracked, allowing gasoline and fumes to escape. The position is in immediate proximity of the vehicle exhaust pipes. - repaired by Ford dealership as an absolute necessity for safety, to avoid a potential fire from gasoline dripping on exhaust pipes either while in motion or parked.

This is a brand new Explorer 2017 with less than 700 miles. I had two problems; the first one is serious. 1)this happened with me twice; where there was a fuel leaking from the car to the ground when I filled the car. I believe this is very dangerous and not safe to drive with a full tank. I believe that if the car roles over in an accident it is going to catch fire I will try to go to the dealership today to fix the problem. 2) the gas mileage in this car is very disappointing. The manufacturer claimed that mpg is 16/22, but unfortunately it is less than 13 in city. I am very disappointed.