Why can’t they fix spellc heck?

Why is it, after years and years of innovation, artificial intelligence, pattern recognition, Steve Jobs saying “one more thing” and Microsoft acquiring stuff like a fat kid in a candy outlet, we are still stuck with dumb spell check?

Here are my number one wishe for “smart” spell checking:

Slow Spacing Detection

I’m a fast and sloppy typist. I took typing (on a mechanical typewriter, no less) in high school. I know the proper form, but I tend to drag or overstrike. For example, I often seem to tag the first letter of my next work onto the end of the previous word. Something like “The quickb rown fox jumped over the lazyd og.” You, as a reader with what I’m assuming is more than ample intelligence can get what I mean there. Microsoft Word’s Spell checker is lazier than the darned dog. Here’s what I get when I hit the trusty F7 and accept the first suggested recommendations, “The quick rowan fox jumped over the lazy go.” How difficult would it be, honestly, for spell check to detect an unknown word and look to to the right or left to see if moving a space would correct it? I can’t be the only person who doest his. (There! I did it again!)

You would have thought Google would have figured this out.