Facebook Group Privacy & Security Settings

For safety purposes, we are transitioning our Facebook page to a private, hidden group. Our organization has made a good start on the new group, but we've run into a configuration issue when inviting our founder as a member. Her secondary Facebook profile is appearing instead of her primary one, which is tied to our current public page. We use this public page to advertise events and pop-ups for our members, but it has attracted bad actors to our events and we no longer feel safe. We'd like to talk through how to resolve this issue and get advice on best practices for managing group settings, admin roles, and member privacy going forward. One additional admin may join the call.