. Officer NOT correct. Asking for the incountry non imm O (After tourist visa or visa exempt) the rule is to prove 800k฿ transfered INTERNATIONAL to a bank account in his name only. Then, with 30 days or less, he can ask for a year extension. If he wants to use the 800k฿ method only THEN it needs to be there 2 months before asking this extension.
"So my STV will come to an end". So you already had y'r two times extension of 90 days ? Or do you mean Single Entry Tourist Visa instead of Special Tourist Visa ?