@รlex *******
you were confusing your entry stamp validity (the time you are allowed to stay IN thailand, which is Oct 31st) with the validity of the OA visa, which is Sept 12.
๐) ๐ ๐ฐ๐ฎ๐ป ๐ณ๐น๐ ๐ผ๐๐ ๐ฎ๐ฟ๐ผ๐๐ป๐ฑ ๐ณ๐๐ต ๐ผ๐ฟ ๐ด๐๐ต ๐ฎ๐ป๐ฑ ๐ฐ๐ผ๐บ๐ฒ ๐ฏ๐ฎ๐ฐ๐ธ ๐ฏ๐ฒ๐ณ๐ผ๐ฟ๐ฒ ๐ญ๐ฎ๐๐ต. ๐'๐บ ๐ป๐ผ๐ ๐๐๐ฟ๐ฒ ๐๐ถ๐๐ต ๐๐ต๐ถ๐ ๐ผ๐ฝ๐๐ถ๐ผ๐ป ๐ถ๐ณ ๐ ๐๐ถ๐น๐น ๐ด๐ฒ๐ ๐๐๐ฎ๐บ๐ฝ๐ฒ๐ฑ ๐๐ป๐๐ถ๐น ๐๐ฒ๐ฝ๐ ๐ญ๐ฎ ๐ฎ๐ฌ๐ฎ๐ฑ ๐ผ๐ฟ ๐ข๐ฐ๐ ๐ฏ๐ญ๐๐ ๐ฎ๐ฌ๐ฎ๐ฑ.
Bouncing out and back before the visa expires will NEVER get you stamped in until Oct 31 2025. You can't get more than a year entry stamp (or as long as your insurance is valid for up to a year)
You bounce out and back on the 8th you'll get stamped in until the 7th of Sept 2025.
๐) ๐๐
๐ถ๐ ๐๐ถ๐๐ต ๐๐ต๐ฒ ๐ฏ๐ผ๐ผ๐ธ๐ฒ๐ฑ ๐ณ๐น๐ถ๐ด๐ต๐ ๐ผ๐ป ๐๐ต๐ฒ ๐ญ๐ฐ๐๐ต ๐ฎ๐ป๐ฑ ๐ฎ๐ฝ๐ฝ๐น๐ ๐ฟ๐ฒ๐ฒ๐ป๐๐ฟ๐, ๐ฎ๐ป๐ฑ ๐ด๐ผ ๐๐ผ ๐ถ๐บ๐บ๐ถ๐ด๐ฟ๐ฎ๐๐ถ๐ผ๐ป ๐ฑ๐๐ฟ๐ถ๐ป๐ด ๐ข๐ฐ๐๐ผ๐ฏ๐ฒ๐ฟ ๐๐ผ ๐ฒ๐
๐๐ฒ๐ป๐ฑ ๐ญ ๐บ๐ผ๐ฟ๐ฒ ๐๐ฒ๐ฎ๐ฟ ๐๐ป๐๐ถ๐น ๐ข๐ฐ๐ ๐ฏ๐ญ๐๐ ๐ฎ๐ฌ๐ฎ๐ฑ.
I don't have the slightest idea why you'd do this but that would work.