Serious Bug in Dolphin Connect

I decided I wanted to connect from my Dolphin site to my UNA site using the Dolphin Connect app.  It appeared to be working fine, a user on the Dolphin site without an account on the UNA site was created in UNA from Dolphin.  Then I noticed a Dolphin user with the name Sam Wilkes tried to log into the UNA site using the Dolphin Connect and he was logged in as an existing UNA user (a user that created an account directly on the UNA site before the Dolphin Connect app was put in place) Sam Perkins.  Now that connection persists even after I connected directly to the database and changed the account name and the user's full name of Sam Perkins to Pissed Off (because that is what I am, pissed off at the moment).  I am guessing the connection is somewhere else now.  I cleared all data, all caches and when Sam Wilkes used the Dolphin connect, instead of creating a Sam Wilkes account, he was logged on as Pissed Off; I am guessing there is now a permanent connection through ID? I don't know. I can't delete Sam Perkins account; so I need to know what is happening here.

This is a serious bug because Sam Perkins was an admin on the UNA site and when Sam Wilkes logged in using the Dolphin Connect he gained access to the studio.