Actually the common factor is that neither of us are in the US, so that must be the issue. Also three contents involved, Africa, Europe and Oceania, John Hansen and Jerry Fisher are in Australia and New Zealand respectively.
Edit, is it Oceania or Australasia, I have to look up my continents
Edit again: It seems Australia is the continent, Oceania and Australasia are regions.
So what continent is New Zealand in?
According to Google, it belongs to Oceania, so it's not in a continent. It's not necessary for a country to belong to a continent which makes sense considering there's lots of islands in the middle of oceans.