My theory such as it is, 5 of each main character= 20
1- jerry, makes 21 at the start of the game
The reason for 2 groups with 6 people in them, one is jerry and one is someone who felt the need to move out of their group for some reason.
May be nothing to it, but coju peaked my interest when he talked about a spy because thats what jerry does in the movie it seems.
What makes you think there is a "Jerry"... I just don't feel it. I get the feeling that an attempted even distribution of the 4 main characters was the original start and the 2x6 1x4 grouping suggests that at least 1 person is not where they belong, but I don't think such a person is "Jerry"