I have done it many times from a different branch of the bangkok bank as chiang khan immagration insists that you have bank statment same day that you apply for your exstension so i use the bank that is closest to immagration
i have almost the same thing happen to me everything was in order but they would not stamp my passport and i am also over me visa which was finnished at 12 midnight saterday and i was told the same thing not to worry but i am very concerned if i get nailed with over stay or if i have to leave the country
thank u yes sorry that is what i have done but my concern is when do they cancel my old extension when i apply for the new one marriage or after the give me the 30 day stamp