Given it only started 3 days ago, I wonder if the practice varies from the official announcments.
I received an update from the Austrlian Govt SmartTraveller service today that states that the 60 days visa exemption for Australian passport holders (plus 92 other countries) started on 15/7/24 and that it applies for 2 entries only in a calendar year.
The same (60 days exemption - max 2 per calendar year) is also stated on the Royal Thai Embassy website.
Time will tell I gess.