I am Aussie. My last 2 trips to Thailand I got 90 day tourist E-Visa in Australia as I wished to stay longer than 60 days. The 90 days starts upon arrival. However your passport gets stamped on arrival at airport or where ever for 60 days which may now be reduced to 30 days. Before expiry of the
*****
day tourist visa go to immigration to have your visa extended to 90 days with your approved E-Visa.
I have now applied for LTR-WP visa & was approved. This allows me multi entry into Thailand for 10 years. Now, no more heart ache.