We got it WRONG! Doesn't that tell you (yes, you!) -- the media consumer -- something crucial? It means that we don't really know what we're talking about... and that the only poll that matters is the one that happens on election day. Which means that you should spit in the eye of everyone who tries to tell you: "the race is over, you shouldn't even bother voting" -- and go vote for who you believe in anyway.
If elections were predictable, there'd be no reason to hold them.
Link thanks to asim.