Adobe Sign thinks I'm someone else

I have a Buildium account, and it gives us access to Adobe Sign. Unfortunately, there are three admins on the Buildium account, and Adobe Sign seems to think one of the other admins is me. How do I get our identities separated? It's creating problems when I try to login to sign a lease. Adobe Sign thinks that I am logged in as one of the other people and won't let me proceed. The other person and I do not share a computer, and we aren't even in the same building. I was chatting with support and he sent me here for help.