I don't the sophomore thing either (bc some of the coolest girls in my chapter pledged as sophomores), but it is usually for financial reasons (only getting 3 years of dues instead of 4) in terms of restrictions placed by nationals (that's what it is in our case and some of the chapters here I know at least). I had two sophomores in my rho chi group this year and they both pledged places that they're happy at. So, good luck! I'm sure you'll find the right place for you too!
