Thanks for the suggestions.

sp_droprolemember 'db_owner', 'qc' gave me the same "user or role 'qc' does not exist in this database".

sp_dropalias 'qc' gives me a "no alias exists for the specific user" message.

When I run select * from sys.database_principals, the name of the 'qc' user does not exist.

When I run sp_change_users_login 'REPORT', I get nothing.

The strange part to me is that when I am in the GUI in login properties for that 'qc' login, database after database have the user 'qc' and a couple of them have 'dbo'. I am out of ideas.