I think both of those are setting up future issues or moments...
I basically didn't do things that would negatively impact the MC's relationships with the LI I wanted him to be with (depending on the playthrough). So I never tell Zach everything, don't switch seats with him in the bus, and never peek at the girls in the training camp locker room. But anything else that gets me points I do, IIRC. Maybe having made almost all the Zach points decisions will factor in later. Perhaps it will help you slide in like Flynn with Zach's sister?
The meeting with John was inelegant, it seems obvious that John is Erynn's dad and no one in the game seems to notice it. Erynn, Iris, and John all have the same complexion and hair color (and there aren't any other blondes in the game now that Rachel is dead/gone) but everyone is oblivious to it. Only thing that throws that theory out is I could have sworn that Erynn said her dad was famous (or Mel did? Or I'm hallucinating?) That scene didn't have enough emotion/tension to payoff how nervous Erynn was... Supposedly.
No way the MC's idea doesn't backfire horribly.
Nyx needs to add in some clones or long lost twins... Not quite at full telenovela levels, creeping closer though.