Oh sorry, I forgot to mention all scene was unlocked, as I did all the story, the problem was when I try to click/replay Silvia's past event in the Gallery its not doing anything, but when I click/replay with others like Estelle it works fine.
But this "Stats" thing is not effecting the past event inside the Gallery, as I did Serena's 2nd event (outside of Gallery) I was lacking in "Toughness" that I can't pick the 2nd option (which I remember there was an option for that), when I raise it up and go back to replay the scene, which is still not there.
Also, my bad I should have mention it early on, im playing this game on Android.
I'll try to start a new game to see if the name thing will be fix.