"It Is Difficult To Fathom..."
Excerpt from the Kol Menachem Chumash:
According to the Chabad custom the peyos (hair on the circumference of the head) may - and indeed should be trimmed with scissors. This is based on the precedent of the Arizal of whom it is explicitly documented that he trimmed his peyos with a scissors. Thus, it is difficult to fathom why a person who follows in the path of the Arizal would grow his peyos long (Igros Kodesh vol. 20, pp. 9-10).