I've solve the issue by delete the system reserved volume.
As i don't need this anymore, this is solving the overlap bug. Just done a partition check and now everything work fine
I'm currently having a problems with a crash during the installation of windows 8, and as a morron, no backup done :oops: . I just got the system reserved partition but my main big partition is unmountable in windows 7 BUT it's browsable in windows XP. (i've recover 50% of my data) The problem ...