I have read the threads and am having the same problem that many other 1pw users have had. Basically, there is wonky 1pw behavior when it comes to the the "No, I am a new customer"/"Yes, I have a password" radio button set.
I have gone through the process of manually creating new logins many times, and this problem remains unresolved. When I have 1pw fill in the form data, it enters my username and password, and then changes the radio button selection to "No, I am a new customer", regardless of my having created a new login with 1pw, obviously with the "Yes, I have a password" selection made.
Incidentally, when I ctrl-\ to enter the form data, usually it just enters the data, and I need to click the sign in button manually. But sometimes all I have to do is his ctrl-\ and the button is hit for me. Why is this?
1Password Version: 188.8.131.524
Extension Version: 184.108.40.206
OS Version: Windows 7
Sync Type: Dropbox