I'll take for granted your error was in good faith. Words are written differently outside of the USA. If this was written in America, it would use the American spelling "center", however it was written in Australia, which uses the British spelling "centre".

If you're interested, the spelling is derived from Middle French "centre", which became part of English post Norman conquest. However, in the early 19c the American lexicographer, Noah Webster simplified many words to be more phonetical and these were adopted by the US. Most of the Commonwealth countries will still use the British spellings.

Where are you from?

The eshays hang out in the centrays, untcay.