Definitely a kink. The seller should have been honest about this, not cool at all !!
Something like that doesn't just pop up in shipping.
There is no way of knowing whether the kink is caused by temp. fluctuations during incubation, injury to the hatchling or some genetic defect in the snake. Personally, I wouldn't use her for breeding because of that.
She should have went on to a "pet home" with full disclosure and at a heavily discounted price.
Wait and see what the breeder will say. If he ignores you or isn't willing to fix this situation, take it to the BOI. You might never get resolution, but at least other people will be warned before purchasing from him/her.
I still can't believe you weren't told of this.