I'm the Queer Club/Pride Week anon, and I did ask the organizers. Apparently they refer to LGB people as "multisexuals" (wtf) and think that having an astronaut talk about queers in STEM fields is more important than having LGB events. When I questioned them further, they said that they chose "to be more inclusive of less privileged people" - read: aces. So I filed a bias complaint against them with my school's equal opportunity office. We'll see how that goes.