Icare -- that's really, really interesting! And yes, I do have problems with knowing the relative order of letters. I have to go through the alphabet each time. I thought that was normal. When I alphabetize, I go through the alphabet each time.

And I am a linguist (majored in ancient Greek and Hebrew), always reading and writing. I can read upside down, backwards, I can write with both hands and write from right to left easily. I do get b's and d's mixed up.

Isn't it interesting how people assume that what they experience is the norm?