They sometimes ask for a copy of "all" your passport pages to check if you are still in the country. They usually ask that when they think, for whatever reason, that you left the country
How long was your money in the bank? Three months there seems to be the minimum. They also asked for documents you couldn't provide, and most likely why you were rejected, no matter what explanation you gave. They don't deal with excuses.
As long as you are not doing any trading locally, and everything is remote, you are fine as far as your DTV goes. If you trade from local platforms inside Thailand, then you need a different visa, even though profits are tax exempt for five years, until 2029.
Every photo you have submitted in the past is scanned and added to your computer data, and they check to make sure they are new photos. I first became aware of this 7 years ago. It's not new.