That happended the first time I filled up too (and filled up all the way). It was as though fuel actually ran on the inside of the quarter panel. I haven't filled up ALL the way since.
My question to all, does the "extra" fuel actually flow back into the tank from the little hole below the filler neck. If so ... wouoldn't water get in there also when washing the car. I am having hesitation problems at 3000 plus RPMs (not the typpical throttle lag) and the dealer is stumped.