Family Share; iTunes

Thanks. Your answer is very useful.

Although I’m still puzzled by these events:

I’ve sent an invitation; it was accepted. Later, I received a notification from Apple stating that member “is no longer participating in family sharing.”

That member said: “I think I accidentally signed out.”

I’ve sent a new invitation, and notified that family sharing new member, but my settings show “Invitation sent.” And when I touch that, the following shows “Invalid Invitation. This invitation is no longer available.”

I can’t make sense out of this.