[kuboris]

Copy paste from the website:

On HackerNews someone gave a plausible explanation for the timestamps: They are regenerated when you download the PDF with the result.

This explains the inconsistencies in the timestamps – but not in the confirmation codes – because they remain the same.

And the inconsistencies also exists in them. The confirmation codes are ascending, so the result from the 16th should have a lower number than the one from 22nd. However, it is the other way around.