Two WTF moments in the movie (spoilers)

[Carol]

Carol earlier:
> > BTW, did the filmmakers make young Lucius, young Severus, and young Regulus cronies of Tom Riddle's at Hogwarts in the Slughorn memory? If so, any viewers who remember that Tom Riddle was at Hogwarts fifty years before Harry (mentioned in the CoS film as well as the book) must wonder how Snape and Malfoy could be so well preserved. <snip>
> 
> Richard:
> The flashbacks were limited and very focused on Riddle.  We were not introduced to any of his classmates directly.
>
Carol responds:
Well, that's a relief, I suppose. But I thought that this film was supposed to show a glimpse of young Lucius Malfoy and, much more important, give us a glimpse of Regulus Black, who was omitted from the tapestry discussion in the OoP film.

Carol, still trying to find someone who wants to see the film with her and almost (almost!) resolved on going alone to a matinee performance for the sake of cheap tickets