@Joe ******
nope. .. what it means is if you're switching to banked money method you'd need to have the 800K baht in a thai bank account in your name only for 2 months before you apply for your next extension. There is no requirement to show it came from overseas
Then once you get that extension issued you need to leave the 800K baht in the bank for 3 months and then the balance can't go below 400K the rest of the year