If you look at Ellie's response to you again, Ellie states: " You still need to cancel your extension at the ' issued ' immigration office. " Hope this helps.
Keep your boarding pass with your passport. They sometimes ask for it. Rarely do they ask for an onward ticket, 20,000฿ equivalence in cash, or proof of accommodation, but it is best to cover all the bases.
Never said it was perfect. There is a learning curve with everything in life. That being said, I adressed my remarks to Garry . Garry is perfectly capable of speaking for himself. As for you...FY and FO. Sorry you are living such a miserable life.