There are many countries in the world and their not just standing there. Some countries disappear, some are created. Sometimes they merge and sometimes they split. It’s not happening on a daily basis but it’s not easy to track all the changes unless you have to.
Besides this there is also a fair amount of uninformed and distracted people that can even confuse Austria and Australia.
Here are some examples:
and some more
See you tomorrow for more "Useless information".