How it works is exactly why I called high school science.
1. I did not get the result I expected.
2. Since I know the correct answer, I'll simply change the datum to that. I'll recognize the correct methodology because it gives me the answer I need.
This is exactly why all published measurements of the universe's expansion were wrong in direction until we got satellite telescopes. The science on the sign of the acceleration was settled, so any data had to be massaged until they agreed with the theory. That isn't science, it's science class. And it's gotten so laughable that climate scientists "correct" measurements recorded decades ago.
Good news: that's not how it works. What gave you such a sily idea?
