My Fingers Can Spell Better than My Conscious Mind

I find it odd that when I type, I don't really think about how to spell what I'm typing. And, if I need to tell someone how to spell something, I'll often need to type it out first (if only on an invisible keyboard).

Is that because while I type, I'm reading at the same time, so I can see what is correct/incorrect? Did my brain wire itself up incorrectly? Interesting phenomenon, though.