Does this also stop it from showing up in my "hosted jams" page? I'm not concerned about the calender, I just don't know why I can't it there.
Viewing post in Game jam not showing up
I don't know, it depends. But even if it's not in the calendar, once you publish the jam page it should be live and fully functional. That doesn't look right. You should probably double-check your settings and contact support if all else fails.