Hi
I can't test this unfortunately because I don't have a Go Phone, but I recommend trying clearing your cache and cookies, and then see if your password is still saved.
What web browser do you use? For example in Firefox you can go to Options - Security - Saved Passwords and remove them from there. I'm sure other browsers have a similar option.
Then try logging in, make sure no prompts pop up asking you to save the password, and if it does, tell it not to save it of course.
Let us know if you're still having issues after that.
Thank you,
Dmitriy