My DS's high school has all the tests (PSAT, PLAN, SAT and ACT) on the transcript. So, maybe if your school is the same, even though you did not elect to send all the scores from SAT and ACT, they may still see them...if they look at them on that section of the transcript. Although it does not sound like you get penalized for a lower score since they emphasize to take the tests multiple times and they will pick the highest scores.
Side note, does anyone know if AFA uses all four ACT scores (math, English, science and reading)? I have read USNA only uses math and English.