I believe where the office is now will move into a new government complex in Mahasarakham when they finished the building...I have personally completed a 30 day extension on my multi "0" and recently a 12 month extension due to marriage there.... :-) :-)
I have a friend from Kalasin who uses Mahasarakham immigration (located at the police firing range just outside Mahasarakham) no problem I use too I live Kantharawichai.
When you are excited about a forthcoming holiday..you don't think that the people you are paying to do things on your behalf are not very good at their jobs..this is a sad story for a family who probably saved like mad to be able to take a holiday of a lifetime... :-(