Duplicate Appointments, "Our staff" as a Provider?

Hello! So, I am having an issue with A+ that I cannot figure out. Currently, I only have 1 service provider, no dummies, and two services. Each service can only take on 1 attendee; however, it occasionally allows two people to schedule during the same time slot.

When I got a chance to look at the Providers for the two dups, I saw that one was "Kat Cary" (which is correct) and one was "Our staff." I am not sure what "Our staff" is... Maybe something I created a long time ago?

I looked in providers, settings, users, and even did a few phpMyAdmin searches, but I found nothing matching "Our staff."

Any pointers?