Saying Abbotts is just saying what bloodline the snake is from. But yes, you can't just go on looks to call something an Abbotts. I've even seen someone claim they had Abbotts Anerys for sale! Anyhow, Lee Abbott worked with some Okeetees, from what I'm remembering, it was Kathy Love stock crossed with wild caught stock and he selected for animals with the thickest black borders. This being said, you can find animals from Kathy Love line Okeetees that are also thick black bordered just like the Abbotts.
And with natural variation in every clutch, you will get babies that though they are from Abbott to Abbott breeding, they themselves do not fit the picture of thick black borders. I've recieved animals in the past that were sold to me as Abbotts and frankly, out of the four, three of them looked like nice normals! So you have to be cautious about what your buying. Don't just buy because a name is attatched to the animals your buying.
Ask background information IF purity of line is important to you. But really, the Abbotts name is thrown on so many even normal babies and called Abbotts Okeetee just to make a sale. Even the name Okeetee is thrown on to help make a sale.
So your babies as stated, are outcrossed, as Abbott is just a name of the line not a genetic morph that is simply recessive or dominant in nature. What creates an Okeetee look is more complex that involves a series of genes expressing the color of the snake.
As for the kinking, there are many claims as to what can cause it. Some say too high humidity, others say too much heat, others say a combination of the two, some say too cool incubation temps... It's a tough call really. But if you breed corns long enough, something like that can and will happen. Congrats on the babies!