Irregulars or Singularities. Regardless of whatever fancy name they were called, in the end, they were literal bugs in the code of the Universe.
They were the Living Embodiments of Errors that had occurred in the Universe, and they made the laws of the Universe that interwove to create the reality people lived in to bend around them—just as light and matter curved around a black hole to form its accretion disk.
Among the warped laws was the Law of Knowledge, which was responsible for maintaining a Planet's Records where every activity happening on it was stored.
Since Arthur's arrival on Aramis, his very presence had distorted the planet's database, rendering its records of him incomplete and unreliable.
This distortion wasn't a deliberate act on Arthur's part—he lacked a full understanding of his Singularity nature and had no control over the way it bent the planet's laws.