A common culprit is picking party planning over helping out with the fashion show (choice late in chapter 4). The points have been rejigged a bit, but I think it's still the case that you get one point less with the sister that way. And in chapter 5, make sure Olivia's choice re Seth's fate matches Kane's choice re doing good during the evaluation. Also, don't try for a neutral path, pick a lane, good or evil, and stick with it as far as is reasonable.
I think those are some of the more obvious traps, you can look at the walkthrough for further details.