Possible error in date for Monsters

I was updating a few shorts that I watched and came across a short that has an extra cast member listed and I did not just want to submit a deletion on it without first talking it over with someone.

The movie "Monsters" (short 2004)

https://www.imdb.com/title/tt0425267 

has a name listed as uncredited  - Marc Bolton ... The Man (uncredited)

When I watched the movie I only saw 5 characters on the screen.  I went back and rewatched it twice to make sure.  I never saw a 6th person on the screen.  There are 2 men in the movie, a madman that kills in the boy's dream and the father.   Could this person be a stunt double or something other than a cast? The name does not appear anywhere in the films credits in the actual movie.

Should this name be deleted or moved to another category?