clerks 3

the page everyone wants to use & rate doesn't have the entire cast listed, the one linked does, www.listal.com/movie/clerks-iii-0/cast . I've seen this in other cases for movies or TV shows on here also. why is the page without the full cast listed the preferred page?

to me this one seems incorrect, www.listal.com/movie/clerks-iii . can the pages or similar ones like them be merged? thanks & sorry