This all sounds like a stunt to sell books. The ghost rider of his book is with the crew and I am sure they had plans to gather as much media attention as possible with a faked run across America record to get people to buy the book and use this guy as the new template for how to train for Ultras.
* ghostwriter :)
And then he could go on all the talk shows and Dr Oz will say "Robert has great running form."
He has a ghost rider too. The one inside the RV pretending to jog across Murica.