Glad you got it sorted! Sorry that your post called out the "foreign bashing brigade", or the crazy faction which adheres to the "bribe you way thru it" method to get things done.

Sheesh, that's sad really.

Unless you know where you're going a taxi will invariably take you to the WRONG building, mostly because Thai nationals never have a cause to go to Thai Immigrations as that's ONLY for foreigners . Thais use the other building which has stuff for Thais in it.

Still good it worked out!

Oh and I welcome as the newest member of the illustrious "check your stamp before you walk away" association. ..

According the information i have officially only the immigration officer ( or his superior ) who made the mistake can undo his own mistake.

Normally the immigration office where you are will change the mistake but this is not guaranteed and they can send you back to the place where the mistake is done.