I've mostly avoided the new site but I came here for the dance groups, and when I was just clicking through to find the fourm, I think I saw a page logged in as somebody else? There was a different name in the top right and notifications for fourm threads I was not in. When I clicked my profile it brought me to someone elses profile, but I was once again logged in as myself.

there is already a thread on this Account displays as different user when opening forums. It seems staff is looking into it from what the last post says.