Bright child can't retain letter names?

It sounds like maybe she is dyslexic. I am as well, though mine is numerical rather than alphabetical. It took me years to be able to "see" certain numbers - I could recognize other numbers, but not certain ones. In a string of numbers, my eye would skip right over certain ones.Interestingly enough, I did not really overcome my dyslexia until I started using typewriters and then computers. Because I knew WHERE those numbers existed on the typepad, I could make them appear on the paper or screen. After a while, I started actually seeing them because my brain knew I had put them there - sorry, that's the best way to describe it. The longer that happened, the easier it became for me to "see" them in every situation.I had to literally train my brain to recognize that those numbers existed. If your daughter can say/sing her ABC's, even by rote (vocal memorization) it's likely she can learn that they exist, even if she doesn't 'see' them quite the same way you and I do yet.