@Luc *******
I have found Jomtien pretty cooperative and helpful. I don't know about what extra paperwork you needed but they give you a list of what is required when you go to the front desk.
The guys from immigration called yesterday and let us know they were coming today between 8 and 9 am to see us. They were here at 8:30 took a couple of photos and we're on there way within 10-15 minutes.
They have only ever been to see me at application time.