Charlie Chan in Honolulu is a 1938 American film directed by H. Bruce Humberstone, starring Sidney Toler as the fictional Chinese-American detective Charlie Chan. The film is the first appearance of both Toler as Chan and Victor Sen Yung as "number two son" Jimmy.
Charlie Chan in Honolulu is the first time audience's heard of "number two son" Jimmy. 
In the original statement it mentions that the movie is the first time that Toler as Chan and Victor Sen Yung as Jimmy are seen together, however it does not mention if this is the first time the audience has heard of Jimmy or not. I think this tricked the system because the system interprets this as the first time the audience has heard of Jimmy. 