@Brandon ***********
That makes lots of sense, thanks ! The main reason I REQUIRE to get a non O-A, at least 1 time, is because I won't go immediately to Thailand. I need to bring my dogs from India to Thailand. So I thought to first apply for a non OA in my home country, then go to India and get the dogs ready, which can take up to 2 months, and then go to Thailand. I didn't realise I am then "locked" in the terms of this visa...