Diesel Fuel System Tank Assembly problems of the 2008 Ford F-450

2008 Ford f450. Consumer writes in regards to a safety concern of an auxiliary fuel tank the consumer stated he purchased the fuel tank and it was installed on June 1, 2011. The tank was made of the same material as tool boxes for truck beds. Recently, a single bolt attached on the passenger side became loose and slipped an inch and a half out of the hole securing the tank to the bed of the truck. The bolt threads were stripped up to the end of the bolt. The nut was at the end of the threads of the bolt. The bolt was protruding outward in the bed of the truck and was bent at a 45 degrees. With the bolt bent over, the tank slid an inch forward in the bed of the truck. The driver side bolt had also loosened, but was still secure with a nut. The establishment where the consumer made the purchase, informed him he tank was supposed to be movable. They stated it was supposed to be secured with one bolt on each end.