one of lillys kittens had a club foot but was no were as bad as your little one. forests cleared up on her own after about 2-3 days. but i would get a vet check that one out they might be able to do something to help.
also im glad everything went well with the birth, they are lovely.
I called the vet and they said that it's a normal abnormality (strange I know) and that most cats grow out of it as they grow up and that there's really nothing they would do for him/her at this point. He has a hard time fighting for mom so I've been making sure he finds her while the others are sleeping and I've given him a couple of supplemental feedings which he takes well.