I was aware that a few "rogue" (offices that do their own thing) had the bank letter the same day as the application, BUT I didn't think Chiang Mai was one of them "
AND many banks you cant update the bank book without doing a transaction (either a withdrawal or deposit) meaning IF you got the letter first THEN went to update your bank book the amounts wouldn't match.
There is NO rule AT ALL that the two numbers have to match (not in the least) only that BOTH need to be above the amount required for your extension
@Julian ****
are you sure you didn't have a lost in translation event about the letter, bank book matching?