sorority recruitment with a chapter that's not listed?

[mystikchick]

hi everyone,
i've been a longtime lurker, but i finally got around to registering because i have a question...my freshman year of college (i'm now a jr), the one NPC sorority on campus held an informal info session which I attended, but nothing ever came of it. I wondered last year if they were still around, and checked the sorority's official website, but they were listed as having been shut. to my surprise, today i saw flyers posted around campus advertising info sessions over the next two days for said sorority, and being confused, i went back to the website and searched for it, and they aren't listed.

i would like to attend but i don't want to get into anything that's not officially sanctioned. does anyone have any advice?