What are the current procedures for obtaining an extension for a Thai visa at Samut Prakan Immigration?

EDIT : Immigration called me about 20 mins after leaving admitting their mistake. I returned and was given a 30 November stamp. However, this sheds light on the procedure for desired extensions from 30 November - 30 December, as I was indeed given the option, granted all required docs / embassy letter / another 1,900 baht would be required.

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Reporting back from Samut Prakan Immigration: US citizen already previously applied for Covid extension prior to 26 September, returned to close the loop on 29 September, given 26 October expiry stamp.

Went back today 12 October to get the new “30 November” stamp (although I’d heard previous accounts from SP Immigration that they were now giving 30 December): told I have 2 choices:

1. Do nothing and leave 31 October or 2. Re-submit ALL previous documents required for previous extension, including Embassy letter, as well as 1,900 baht, and I will be stamped to 30 December.

I read in someone else’s comments on a previous post that they received a 30 December stamp, but I did not read that they needed to re-submit all docs / 1,900 baht again for a new extension - so perhaps they have switched up the requirements even since then.

Would appreciate if anyone else that’s visited SP Immigration recently can speak up or if admins can provide any insight. Thanks as always 🙏🏼