groups

so, i'm not positive, but i'm guessing that the stuff that i post in groups is not available to any old soul perusing my homepage.  so apparently i've written some good stuff in the poets and writers group.  i think that you have to join to read it?  i'm still trying to figure out the intricacies of this site and where all my postings wind up.   all i know is my last two poems don't seem accessible from my recent activity.  anyone know the details of this situation?