it was always like that, or it was always done in this way (see Molina)
Orthographic Variants:
çammochipa iuhcatca
Alonso de Molina:
çammochipa iuhcatca. siempre estuuo assi, o siẽpre estuuo desta manera. Alonso de Molina, Vocabulario en lengua mexicana y castellana, 1571, (www.idiez.org.mx), f. 14r.