Update, my wife and I who are both Canadians successfully got 60 day extensions yesterday for 1900 baht.
Stamp was extended to January 29th from Nov 30th.
Whole process took about an hour with the help of this post and some of the volunteers at the Chiang Mai Immigration double checking the paperwork before we went inside.
Thanks for your help
@Tod ********
Cory Rose and James Miller plus this whole community of people reporting what's working and not working ๐