For some reason I won as east first hand and was still first to go the second hand even though I was north in Australia rules.

The bug is fixed, I think. Cheers!

Hi Dev, can you explain what the difference in Australia vs Zung Jung is? Is it only the 5 point minimum to go call mahjong?

Where can I find a place to examine and compare the rules?

The difference between Australia and Zung Jung rules are that Australia rule does not allow chicken hand. That is my understanding. Let me know if I am wrong :)

Here is a link to Australia rule

I remember there is a pdf file of Australia rule on the internet, but can not find it any more