Well an UPDATE, Yesterday the original Immigration Officer here, went to my wife's shop, and told her that, he can take care of my marriage extension for 2,400 baht !
Of course the fee is 1,900 baht and you can bet that is what the receipt would show.
He also went on to tell her about the 100b service fee for the 90 day report, is because they now they have 6 staff and the office has A/C, how laughable these people are, oh and it's always had A/C, so now they want to charge us for their Air Conditioning........