Allie--
While I respect your commitment to your beliefs and where you wanted to go, I guess I see it this way. A lot of people go through recruitment, and they think they know where they want to go and all that. But some of them end up hating their groups for numerous reasons like older sisters hazing them, or realizing that the women they thought they met at recruitment aren't really the women they thought they were.
As a PX, I highly advised against single preferencing, because I learned something interesting about sororities. They hardly ever cut enough women to help eliminate the disappointment of women single preffing. Unfortunately, sororities who don't cut enough women end up leading on women who they would never give a bid to, and that's the sad part. And this is the reason we tried to encourage listing more than one group on a pref card.
I hope this doesn't offend you, because I think you're incredibly lucky to be part of something you're so committed to, and I feel the same way about my organization.

I just wrote this because I wouldn't want a rushee reading this to think that single preffing is the way to go all the time. Sometimes women end up loving their houses, when at first they thought they didn't connect.