I often wonder what would happen if you did not do a TDAC and arrived on the shores of Thailand with no passport in a small inflatable boat. Any chance of a free hotel room?
I think we are on the same page but you know as well as I do how easy it is to annoy an IO at some offices maybe by just wearing shorts. Once annoyed they will look for a way of doing you in. I have seen it happen. I'm glad you are on good terms with your office as am I.
its a technicality but the stamp is legal unless you use a dodgy agent. The issue is that it is not from your home province and if the money was deposited for only a few hours you have not met the terms of the extension granted. Both of those facts COULD cause you big problems down the line ranging from deportation to a bit of inconvenience. I would rather risk neither. The fact I did and got away with it was down to ignorance and luck.