Harry Potter and The Goblet of Fire Mistake

According to The Leaky Cauldron website, fans have noticed a blunder in the promos of the new Harry Potter movie. In the Goblet of Fire, to quote from the website, "Harry is shown standing in front of a grave with three names written on in, including one that reads "Tom Marvolo Riddle 1915-1943". As we know, that is the name of Lord Voldemort,and who, despite his err unnatural state at the beginning of the sequence of Goblet of Fire, was not buried in that grave. He also did not kill the Riddles until 1944 or 1945. Readers have also pointed out that even if this was the name of Voldemort's father, then he would have only been 11 years old when Voldemort was born." Read more here.