@napat98 - From your link: "a source sent FairTest a website link to what purports to be the test scheduled for use in Asia on Saturday, January 24. It appears to be an exam form administered in the U.S. in June 2014. Multiple other sources report that test coaching companies in China and South Korea are selling access to this document.”
This has not been “falsified by events” because it was “purported” and says “sources report.” Rumors may not wind up being accurate, but that does not mean Schaeffer’s claims have been falsified because he acknowledged that these are rumors from sources.
Your second link says “some if not all of the questions on two versions of the exam given that day were posted online, and a week in advance of the exam, a U.S. nonprofit organization known as FairTest received a PDF of one of the SAT test forms.” But this too has not been falsified. It’s quite possible that Schaeffer was given access to multiple tests, and at no point did he claim to know for sure that the Jan 2015 international test would be the June 2014 exam.