I did my first extension of non-o Thai wife visa on Monday 13. Very efficient young IO (3 pips) . Checked passport re-entry date and asked to see TM30 receipt which I had done earlier same day.
Arrived back at BKK Wed 08 @ 5 pm When we are in Bangkok we stay with wife's sister TI closed Thursday, so we go to CW Friday to do TM30 Wife speaks to IO who tells her because of holidays we have 7 days from arrival to report. Go back Mon 13 and submit TM30 to a young civilian girl that does initial document processing. She says we pay thb800 for late report, which fires up the wife. Go to the IO ... wife explains again, no fine.