Yeah, they mentioned Aus/Nz every time they started a tour I personally think (having just come to conclusion), that they need to mention this so that their tour seems extensive, and financial backers (be it the label or Sanctuary board or whoever) are more willing to cover initial costs.
Maybe back then they could get away with it because we didn't have the internet and so this sort of news wouldn't be spread around everywhere. Mention Aus/NZ and hey, if they don't tour then chances are most people won't know.