Here's how to reproduce this problem using Paypal (obviously, you can't log into any of my bank accounts ).
Go to paypal.com and click "Sign Up" (The link on the upper right corner of the page). Then, click "Continue". Now, I have PasswordMaker set to never store my password, so PasswordMaker prompts me for my master password -- I click cancel, but PasswordMaker fills in the name and email address fields with my email address.
I don't know if there's really any workaround to this problem??