What should I do if I'm unsure about my extension date for retirement in Thailand?

Still a little bit confused.. ok I got my extension based on retirement yesterday.

No problem what so ever .. and I also got this , which I was aware of but didn’t know how it would be presented so to speak .. anyway the officer gave it to me and pointed to the date ,Oh right I said , then noticed the date , I said , I might not be here in the country on this date ? , it’s ok he said no problem ... Er , “ ok do I come back after my return which could be late January? .. no no he said , and pointed again to the date on the paper 🤔. Then he moved onto the next customer ... I’m a bit in limbo ... 😂🤔.