don't think I've come across that before I have to say, hopefully some others will have.
However, the under consideration part is normal in some of the immigration offices. I wouldn't worry about, I haven't read of anyone getting the under consideration stamp and then being denied the rest of the extension.
because everyone else who has been in your position has had to go back to the immigration office which currently has them under consideration. Enjoy your trip back to Pattaya, hopefully there will be a bit more life there when you go back!