It is posible to do a login as wp-admin user when logging in with the same email address.
1-. You have to know the wp-admin's email address.
2-. You have to run an openid provider.
3-. Register an identity in that provider with the wp-admin's email address.
4-. Go to an article and try to comment using the identity provider you own.
I checked this out by a couple of facebook accounts.
So, Social Connect shouldn't be used until this issue is fixed.