Why 51 here?
The Śākta Pīṭha tradition is transmitted in more than one enumeration. The Pīṭhanirṇaya, also known as the Mahāpīṭhanirūpaṇa, is a major textual tradition that gives fifty-one Pīṭhas together with the associated Devī, Bhairava and aṅga. D. C. Sircar prepared a critical edition from multiple manuscripts and related textual materials.
Devotional respect: a “variant” label does not mean a temple or regional belief is being rejected. It means that more than one honoured textual or living tradition survives, and Shades of Bharat will present those traditions side by side.