Just a quick question

I've heard that recruitment at the u of A is super competitive. That being said (if this isn't one of those secrets sorority women aren't allowed to share) do rec letters make or break a girls chances at getting bids in Wildcat country? I've realized that I have little to no connection to greek women, and I would like to have as best a chance of getting into any of the sororities as I possibly can.
Additionally (sorry I have another question!) for some reason I was under the impression that there were only 11 sororities on campus, but the "chapter profiles" link on the U of A Greek website shows 14. Are these new additions to the school or did I just misinterpret the information I had?
I would love to find a home that fits me in any of the sororities at the U of A. I have heard that there isn't a bad chapter on campus, and I'm so excited for August to get here! Any answers or Arizona-specific advice you could offer would be much appreciated! Thank you!