Spinal Breathing was a mistake

After researching about all types of Kriya pranayam, I've come to a conclusion that spinal breathing was a misunderstanding of actual kriya pranayam of lahiri mahasaya. Lahiri said to not forget about om japa in the chakras and one should do om japa in the six chakras with the kriya pranayam. So it's actually not about doing spinal breathing (visualising or sensing prana going up & down in the spine with the breath) but going up & down through the chakras oming into 6 chakras with the breath. I think it was a mistake or misinterpretation or misunderstanding from the begining that led to spinal breathing technique. I may be wrong, but after listening to people of different lineages and analyzing it, I think original kriya pranayam doesn't have spinal breathing.