Interesting interpretation, man. Affinity - something that reveals only under pressure, thus shows true nature of the main character. However, if we look at list of major dik choices, I'd say it's not the case:
Roughly only half of the choices are imply pressure and/or a super-tight time frame.
As for status, DPC introduces it like this:
Merely a current
mood of MC, which sorta make sense given fast and crazy pacing of our storytelling although polar minor choices within the same playthrough might seem too inconsistent just for one person. Given this and confusing presentation at the end of each episode as you've provided
where status range slapped on top of affinity axis I assumed at first that when we're making a major choice, we're also reducing the maximum possible amount of DIK/CHICK points, which actually is not correct. However, official walkthrough's description confusing about this as well:
Penalty to the status. I wonder if that was original DPC's intention but during the implementation he abandoned the idea or it was the other way around.
Returning to the M/J issue, I disagree that they're capable to see through MC given your interpretation, it's simply too soon storywise. As for what affinity as I see it - simply what defines MC: his reputation, his attitude outside of player's minor choices and I wish even his appearance ajustments (shame that it's next to impossible given technical aspect of the game). To put it bluntly - it's written on his face. It just an example of a bad implementation with M/J, unfortunately. Basically something like this is inevitable within such a relatively complicated game.