As much as I'm tempted to point out the semi-inconsiderate way you ask for help, I couldn't help but notice that a VERY similar thing happened to me when I uninstalled a Smash NSP a while back. I didn't get the 14GB back and never found an answer as to why. It happened right off the heels of re-installing corrupted games. Will be curious to see if you find an answer and if you do, consider saying 'thank you'.