@@cfg So, when the bug was in pace on the song, you achieved the 100% (because of the bug). so, the save file thinks you played it perfectly. The CFSM fix can't go back and figure out what you played correctly in the past. It can only fix it so the game reads it correctly the next time you play the song (and every time after that). So, you need to check the box to not preserve stats and have it go back to 0% and then replay the song. If you preserve the stats, the song will still show a 100%; however, it will show you the correct percentage each time you play it- but will still display 100% for your best score, because it thinks you did that... hope that makes sense.... the best thing to do is to run the 100% mastery bug fix on all of your non-repaired songs, reset all of their stats to zero, and then have real numbers going forward.... just dont forget to check new songs thru the CFSM when you add them in the future :)