If you keep the 800k make sure you get documentation from the bank covering 12 months and including 12 monthly deposits of 65k and highlight these on the 12 month statement so that the IO is aware that this is the reason you are applying for the new extension
I don't think that you are on a Non-B visa for the last two years. Look at the latest stamp in your passport which probably stays "Extension of Stay Permirred up to _____" just like this