I have seen that as well. On my main Quinn route, where I played to have the best reactions and face expressions, I run it in Neutral (after ep6). And Quinn challenge on e9 goes perfectly with Neutral affinity with MC telling heather "maybe in the future" (Neutral decision), not kissing the vixen girl (Neutral decision) and telling Vinny off when he tries to intimidate MC (also neutral).
Even though the game doesn't require you to be on DIK's path to hook up with Sage, I understood in EP6 when he makes you decide if you wanna date Jill or take care of Sage, that it was a separation of both sides, Chick/DIK. And I understood that if you were going for Sage, you'd better be on DIK affinity. After all, since the start of the game she appreciates you more if you push Chad instead of calling security (DIK), If you turn her around to check her skirt (DIK), and if you have the courage to fuck her on the sofa at a DIKs party before you being stopped by Jacob. She is the only main girl who gets overjoyed with your DIK decisions.