It’s confusing. I had a valid visa until Oct 2020, but was the kind you get overseas that requires exit and re-entry every 90 days. Due to COVID that was impossible, so I think it was a COVID extension, not one to visit family.
My last entry was valid until 9 May 2020. It looks like I did an extension in July that gave me until 14 September 2021 but that was just to avoid having to exit and renter. My original visa was still valid.
I just had to pay a 2,000 baht fine because I didn’t have the slip (never given to me at Chaeng Watthana) and the IO insisted that my report was due 60 days earlier than I had been told. Lesson is: make sure you get the slip!