After the last rag section closes, and after the closing miscellany, the volume ends with a verse listing of rags and their associated forms, known as the Ragmala. Whether it is part of the Guru Granth Sahib has been argued within the Sikh community since at least the nineteenth century and is not settled.
One position holds it to be integral. It stands in the received manuscript tradition, it is printed in every standard copy, it occupies part of the fixed 1430 pages, and on that view a reading of the volume is not complete without it.
The other holds it to be a scribal addition rather than the word of the Gurus. Its content, a technical listing of measures in a scheme that does not match the volume's own arrangement, is unlike anything else in the Granth, and some congregations conclude a continuous reading without reciting it.
The dispute is genuine, it is internal to the tradition, and it touches practice rather than only scholarship. The atlas records it as disputed, names the positions, and does not adjudicate, which is the only defensible posture for a reference work standing outside a living community's argument about its own scripture.
It is worth noting what the dispute does not touch. Nobody proposes altering the pagination, and nobody proposes an edition without the passage. The argument is about status, not about what is printed.