See, I've heard the same thing about Phi Mu and Kappa Sigma (Phi Mu has two noteable male members: Robert E. Lee and Stonewall Jackson. Jackson is a Kappa Sig.)
That could be b/c the boyfriend's a Kappa Sig though.
On my campus we're supposed to have the Kappa Sigs as brothers -- this Phi Mu chapter grew out of a local, Omega Delta Epsilon, which grew out of the little sister organization of Kappa Sigma.
And YES -- Chi Omega and Chi Omega Alpha are different groups. Alpha Chi Omega is different, too, which is maybe what you were thinking of. You'll get jumped for sure for that one.
