I'm staying in pattaya a few days so I tried Chonburi Immigration. Had to insist to two 4 different employees that I had a reason to be there. Eventually what seemed like a supervisor took over and gave me a list to get the 30 day extension. They would not provide the until 26th stamp.
Hopefully your planning to be gone awhile as you won't be able to reenter without a coe for the near future, unless rules change to allow retirees to enter.
Maybe asking the wrong question. Ask how to change from your current visa to the one you want. Skip over the 30 day thing since it doesn't appear to apply to you
Get a 60 day extension for visiting a thai family, then immediately apply for your marriage extension because you'll be back on a stamp. Requirements vary wildly so you will have to speak with immigration