If you have already paid you should be able to contact the embassy and tell them it was a mistake and ask them to issue you with a standard tourist visa instead, if that is the visa you want.
I have been able to change visa types with the embassy concerned after submitting via the e-visa system before.
They won't refund the difference if your chosen visa is cheaper but if you want a more expensive visa they should allow you to pay more.
You may see more people with similar questions about overstaying or providing incorrect replies about the CURRENT consequences for those who have overstayed because some of the information documents for certain visas on the MFA website say,
"IF YOU HAVE OVERSTAYED, YOU ARE NOT ALLOWED TO SUBMIT AN APPLICATION FOR THIS TYPE OF VISA."
I believe that this poorly worded sentence is what is generating the confusion.
I believe that someone else here used their travel insurance with the London embassy for a Non-O visa. I asked for more details at the time but I think that part of the thread was later hidden.
I don't think that the airline would change it without you initiating the change, although they may make a fuss about it, in which case you could point out that you can extend your visa for 30 days in country (if you're on an Australian passport). Although, if they offered a free or cheap change, I would take it.
You shouldn't have to pay a fine for 1 day overstay but you will get a note in your passport... as long as you don't get caught before getting to the airport. Get caught and it's another world.
If your flight out on the 17th is in the early hours of the morning e.g. 1am or 2am, etc you could go through immigration a little early on the 16th to avoid being on overstay.
Will you actually be landing in Thailand on July 19th or July 20th?
I ask because I think that from July 19th to September 17th is 61 days in Thailand rather than 60 (they count the day of arrival as day 1 rather than as day 0).
Thank you. I know about the $20,000 COVID-19 insurance requirement for the Thailand Pass but I think that they may have also extended the requirement to have 40,000 baht outpatient and 400,000 baht inpatient insurance from a selected Thai provider (or persuade a foreign insurance company to sign their certificate in Thai) to Non-O visas purchased for the purpose of retirement via the e-visa system.
If true, this would be similar to the Non-OA insurance requirements (although the length of cover required may differ).
Do you have to report to immigration annually so that they can check that you have adhered to the financial requirements for the first two years and the insurance requirements every year?