MDE F&F list question

[SquashBanana]

There are 11 total people in my friends and family list with 6 different MDE accounts between us. I noticed that we are divided into two categories: "We're planning together" and "My other family & friends". Since I made park reservations for all 11 of us, I would think that we would all be in the planning together section, but we're not. Is there a setting in mde that would move everyone into that section? Or are they categorized automatically by some other criteria?