Info only - visited Chiang Mai immigration yesterday for a multiple re-entry permit. Downloaded a form and completed, had all the relevant copies needed. After waiting for a ticket was told you have to complete their form not online one. Completed their form, exactly the same information. They checked the paperwork, all good and issued a ticket. After waiting 2 hours had to leave for another appointment, still about 1 hour to wait.
Visited again this morning, after waiting 2 hours was issued a ticket, same paperwork as yesterday. Waited another hour for my turn. Happy to beat the 12 o'clock lunch break by 5 minutes. They took my photo and 3,800 baht after I had signed each page, was then advised they wouldn't issue the permit because I live in Tak province not Chiang Mai. Was given my money back and told to go to Tak immigration in Mae Sot.
Hope this doesn't happen to anyone else.