Here's the full list...
Boys
Number cruncher, diplomat, explorer
Linguist, sculptor, footballer
Physicist, pianist, hurdler
Chemist, cook, rugby player
Researcher, artist, rugby
Girls
Storyteller, mini chef, runner
Scientist, actress, horse rider
Writer, artist, hockey player
Politician, debater, modern pentathlete
Mathematician, flautist, tennis player
Doctor, guitarist, hockey player
Biologist, harpist, netball player
I think the girl probably got "mini chef" to avoid having chef twice and she was younger than the boy chef.
I'm really struggling to see the problem here.