Sometimes, I get the inexplicable feeling, which also happens to be maddening, that the word why is spelled wrong. In my mind, for a few seconds at least, the spelling doesn't match with the word at all.  Other words are while, when etc. This is usually followed by a frantic search online or in a dictionary for the word's spelling, after which my mind truly believes that the spelling of the word is correct.  
What is the phenomenon where a person inexplicably feels that a word is spelled wrong?
perception;language;language processing