Yes, my wording was wrong. Most people know the 60 days extension, and the yearly extension, as "marriage extension". So I usually use that terminology. Both are for the reason you said which imply that it's basically an extension because you are married and want to see your wife.
Both 60 days and yearly extension are technically not "marriage extension", as both are for "visiting Thai spouse". But it's an easier jargon to call both "marriage extension".
Also, an admin and Visa expert can't answer my question. I'm a visa expert and I can't. Only someone who went to Khon Kaen recently to do 60 days extension can answer that question. It's office dependent, each office set their own rules which can change every few months.
As I said in my post. I'm well aware of what I'm asking, that's why I said in my post to only comment if you know the subject. i don't need help understanding what I need, I've been here 12 years and doing plenty of such extensions already. I asked if the services I want is available in Khon Kaen, since it was discontinued in Udon Thani 4-5 months ago.
If you are being stopped getting into Thailand then you have no opportunity to get a 30 days extension to begin with since those can only be done from inside Thailand. I have no idea which article you are referring too.