Incubation temps may not have had anything to do with it, but it is possible. It could have been genetically pased to the offpsring neonate from somewhere up the family tree...
Snakes that are born with defective kinks will always have them. Some will 'grow out of it' depending on the severity, but they will never go away. As a snake grows it gains muscular mass that will support the snake's kinked spine better. If is snake is severely kinked at hatching there is no saving it.....I usually freeze mine....But that is just me. I also believe that less severely kinked hatchlings (kinked at birth) should never be bred....The trait can and will be passed on eventually.
Now....there are malnutritional kinks (bumps) as well. Nonfeeding hatchlings get these from time to time. The kinks feel like little bumps on the spine. I had an alterna once that developed 3 or 4 malnutritional kinks. After 5 or so lizard meals they were unnoticeable by feel or sight....I don't know if they actually went completely away or not. She later started on mice and grew into adulthood producing 3 clutches for me before I sold her. Non of her offspring had kinks and I informed the buyer of the spinal bumps she had as a hatchling nonfeeder.....and he was the one who told me about malnutritional kinks
I hope this helped you out....If your snake is thriving I would not breed it rather keep it.....
John Lassiter