As both a former member of I-team and a former Rho Chi, please understand something. Girls lie. A girl who dropped your group gains nothing by saying that she cut you, so if you ask her, she might just say "Oh, I didn't get invited back." You, as a chapter member, do not necessarily know what really happened. If your chapter has anything like I-team, THEY make the ultimate decisions, no matter how much they act like the chapter has a big say in the outcome. Sometimes I-team knows things that you do not know, which are unneccessary to share with the chapter. If a girl doesn't come back, look at it as just that. A girl not coming back. Whether it was due to her decision or the chapter's decision should be of little importance at that point.
Sorry