Cut from legacy chapter, and almost every other chapter after first round

[confusedmom]

I've been reading the posts here for a while. My daughter is going through rush at a medium competitive west coast school. She was cut from every house but one after the first round. She had recs for most of the chapters, 4.0+ GPA, many activities and awards, comfortable talking to anyone,etc.

Her grandmother was in a house, and sent in the legacy form, etc, but it turns out that the address on the school's website and the address on the chapter's website are different, so the rec may not have made it to the house, we have no way of knowing.

She was only invited back to 1 house after the first round, so she's decided that she'll go ahead and give that house a chance. Is it possible that the legacy house doesn't know she's a legacy and would that make a difference? Or is it even a legacy if it's your grandmother?

Thanks!