Yahoo Email login

When I sign into one of our email accounts, two dialogue boxes appear. The top for an email address, the bottom for a password.

When I begin to type in the email address in the top box, I am given two choices. One is wrong. I choose the correct one.
The password box fills with the wrong password. I select it and press delete. More choices are given, only one is correct. The others reflect old passwords that have changed.

How do I eliminate all the outdated choices? So that the sign in is automated?

Thank you.