I have two different accounts:
When I try to log into email2@gmail.com, the login screen automatically says "Signing in as email1@gmail.com. Not you". I tried cleaning cache and removing history for all time. I still cannot log into email2. It always takes be back into email1.
This really makes for a horrible experience. I understand I can be logged into one account at a time, but it should allow me to log out and back in. Specially when I am clearing cache and removing all history!