Other mistake: Ron gives Harry a book for his birthday, which he says Fred and George gave him last year on his birthday. He says he wished he had it when he was with Lavender. However, Ron was with her on his birthday last year.
Continuity mistake: When Harry is viewing Snape's memories, he witnesses a scene on Platform 9 3/4 between his mother and aunt Pentunia, in which Petunia tugs her hand out of Lily's grasp. Her hand is then back in Lily's and she tugs it out again.
Trivia: J. K. Rowling considered two alternate titles for this book: "Harry Potter and the Elder Wand," and "Harry Potter and the Peverell Quest."
Question: Voldemort said Lucius has no need for a wand anymore. Without a wand he really is useless, so why not just kill him and his family earlier due to having no faith in them?
Answer: There's no known explanation. For one, it serves the book's plot to keep Lucius and his family alive throughout the series. For another, Voldemort liked mentally torturing his victims, stretching out their fear and misery for as long as possible for his amusement. He may also have felt that the Malfoy's usefulness had not yet entirely run out.
raywest ★