The top rated lists are made of all movies ever to be released on WcM.
If a movie breaks a certain downloads/streamed/rated limit, it will appear on the list, no matter when it was released.
Elder movies often reappear there, cause they ding platinum (or two or three or even more), so they appear on this list. That results in even more clicks, and high ratings.
And a movie, that is allready in the top rated list, can stay there for a loong time.
Tales of the past three, for example.
I think, thats how it works, so we are mostlikely not facing a mistake here.
To the admins : please correct me if I'm wrong.