Usually when I forget my password for a site I don't currently have stored in 1Password, 1Password asks me if I want to save the login when I'm on the password reset page, which I go ahead and save.
1Password won't currently have the username stored (or may have stored something incorrect such as a auth key in the username field) so when I actually log into this site with my details the username is obviously going to be different to what it has stored; in the past 1Passworsd would notice this and prompt me and ask if I wanted to create a new entry or if I wanted to update the current entry - of which I always chose to update the current entry.
Problem is, for the last maybe 2 weeks or so I have noticed that it no longer prompts you on what you would like to do if you enter a different username than what it has stored and it's rather annoying as then I have to manually go and enter in the correct username.
1Password Version: 220.127.116.116
Extension Version: 4.6.1
OS Version: Windows 7
Sync Type: Not Provided