Hi,
about #1: When you're trying to connect to an existing account, you get this message. Then you're asked for your password, if that is your account. Just fill in the password and send the form again.
I'm not sure about #2, because I don't work on the web, plus this is a 3rd party forum application. Maybe you could post a screenshot or something more specific about those errors? Btw. you did post it after all, didn't you?
Ondra