Ah sorry daemon, I didn't ask it clearly. It's the confusion from Night's fix to 3 wog - secondary skill text.ert.
He replaced all "%%" from the ert to "%". Although it doesn't seem to be necessary on me. Becoz even it's "%%" in the ert, it will be converted to "%" in the game, at least on a few strings I tested with.
But I did remember some "%%" will still be "%%" in the game...although I have no idea where they were now