Speaking only as me and without a context of any particular religion, i believe that variance and variation in religious practices within the adherent of the same religion is a not necessarily a bad thing as long as it doesn't corrupt the very essence or the core values of that religion.
Variations often lead to diverse practices and often helps absorb/accomodate local customs and traditions versus an absolute practice which calls for wiping out all signs of anything that doesn't adhere to a prescribed set of practices - and in the essence aims to homogenise.
To an extent, difference in interpretaions are a good thing because when they are not creating chaos, they are tool for healthy dialogues and also encourage tolerance to a different view.
Baba Tomar Bangladeshe Koto Kola Chao
Kola Bagan Chash Koira Kosto Koira Khao Baba Re