Personally, I think it's a conspiracy. Think about it, most of us have been spelling these words correctly for years if not decades, then along come these PC's and Smart-phones and suddenly we can't spell anymore? It's not us that are dyslexic, it's the keyboards. The computers are in on it too and probably spell-checker also. Why else would we put a word in a sentence when it makes no sense for that word to be there, just because it's spelled correctly? They're out to get us I tell you.
Tongue firmly in cheek,
Don