Password change stored but not changed on login

For one of my financial accounts, I changed the password on the financial site, and I changed the password in 1Password. But whenever I go to that financial company's website 1Password will enter the OLD password. I've gone back and checked to see it the new password is stored properly in 1Password. It is stored properly, but whenever I log into this particular website, the OLD password is automatically entered. Does anyone know why this is happening? Thank you.