From women I have heard about through the years who had legacy daughters it appears some are released from their legacy chapters and others are not. SC has families where generation after generation wish to enroll. Some of the older chapters have more legacies than spots in the new member class. Some are legacies to two or more chapters.
Member selection is private information. Your daughter has had great choices. She appears happy with her invitations and is looking forward to a wonderful experience in her new home.
From what I understand many women were released completely and would love to be in your daughter's place tomorrow.
I wish her happiness Sunday evening when she opens her bid!