But here goes. This will take a bit of stage-setting before I get to the question.
The situation involves a single family. Two children, and mom.
All three have volunteer profiles. The kids are altar servers; mom is a Rosary leader. There is a family grouping. Only the kids are members of it; mom is not.
Kid1 and Kid2 phone and email are bound to the family group.
Kid1 serves only on Sundays, and only at the 8 a.m. service. Kid1's service time preference is bound to the family group settings.
Kid2 is available to serve Sundays at 8 a.m., but also is available to serve Mon-Fri at daily Mass. For this reason, Kid2's service time preference is not bound to the family's.
Mom's service-time preferences are set to Sunday 8 a.m. and 10 a.m. only. No part of her profile is bound to the family group.
Over in the settings for the Altar Server ministry, here is the setup:
And over in the family group, here are the settings:
Because of the way the ministry is set up (no boxes checked), I infer that the checked box in the family group has no effect. As I understand it, the "allow members..." option is a family-by-family override of the "never split up..." ministry-wide policy. But you can't override a policy that hasn't been put into effect in the first place, so checking the "allow members..." box is pointless. Maybe I'm wrong?
But that's not my question. Here comes the real question:
Mom wants to serve as a Rosary leader at either the 8 a.m. or 10 a.m. service. BUT: If Kid1 and/or Kid2 is scheduled to serve at 8 a.m., mom wants to be scheduled only at 8 a.m. She wants to serve at 10 a.m. only if both Kid1 and Kid2 are not scheduled for 8 a.m.
How to configure this family to achieve this state of affairs?