Jerec, I've had similar things happen to me a few times. It's not an infrequent occurrence. It's a common one and it's irritating as heck. I know that I can keep playing and eventually--not through improved skill, as I'm already pretty good--I will unlock all of the characters because the game will randomly decide to treat me nice. But we've come a long ways from when Super Mario Kart was so addictive because all I needed to do was get better. If Nintendo would just fix that one thing... but I don't think that's in the cards. I hope there's a Mario Kart for Wii U and that it's excellent, but my level of confidence in the series has dropped. At least I'll always have Super Mario Kart.
"Too often we enjoy the comfort of opinion without the discomfort of thought." - John F. Kennedy on reality
"What if everything you see is more than what you see--the person next to you is a warrior and the space that appears empty is a secret door to another world? What if something appears that shouldn't? You either dismiss it, or you accept that there is much more to the world than you think. Perhaps it really is a doorway, and if you choose to go inside, you'll find many unexpected things." - Shigeru Miyamoto on secret doors to another world