There have been well over 100 posts in the various Thai visa and Expat groups about this in the past 2 days. Do a search if you are part of different groups, and you'll see literally 1000 post comments about this exact issue.
I just said a month ago as an example. What don't you understand from all the posts that this just happened to so many people yesterday? Fine, you would have had no problem at the bank 2 days ago, but tomorrow, you would if you had any interaction at the bank branch that requires them needing your passport to copy. Why is that so hard for you to understand? It's not all about you, now is it? The point is that this is a huge problem right now for many people, and you dismissed it as not an issue just because you are getting away with it for now, then claimed the bank doesn't care when you switch visas, when the fact is that they do, and they just don't know about you yet.
it will obviously catch up with you at some point where you need to go into the branch. It might be when your ATM card expires and you need a new one, for example. This just happened yesterday so you can't say they don't care because they didn't a month ago.
wait till the next time you need to show your passport to do something at the bank that requires them copying it, like getting a new debit card or making a change to your account or opening a fixed deposit. That's when you will likely have the problem when they flip to copy your current entry stamp which will show you entered on DTV.
where have you been? There are literally hundreds of posts in the last day about people who just got this issue in all the Thailand groups. There's literally a post every few minutes between all the Thai visa and Expat groups.
then they close your account, unfortunately, because you can't show you have a qualifying visa for maintaining the account. I've read at least 100 posts in the past few weeks, and it seems the only exception is for people who own a condo or property in their own name (not spouse's name).
you're still wrong. The 9th November date has zero to do with his allowed stay date. It's simply when his visa needs to be used by to enter Thailand. It's the equivalent of saying his gift certificate to enter Disneyland must be redeemed at the box office by 9th November. It doesn't have anything to do with calculating when he can stay till. For example, he might enter Thailand today on his visa that is valid through 9th November, which would make his permission to stay end on 14 October. So he would need to go to immigration to extend it before 14 October, not before 9 November, which grants a stay of 30 more days until 13 November, which still would not be enough for him to stay until 26 November as he wants to do. On the other hand, if he entered on 27 September, even though the visa was valid till 9 November, he is still stamped in for 60 days, allowing him to stay until 26 November without needing any extension.