For some reason many of my typing includes double letters not wanted, like a double "i" (ii) as in "askiing". My spell checker does not pickk up on this all the time. Have I told the Mac to ignore double i's or something? I have it set to red-underline mis-spelled words as I type. It has underlined both 'askiing' and 'pickk' words above, but in emails it does not. How can I fix this?