You have to reset your password every time? As in, you are forced to change it to something new? I have never seen that.
The only thing I see happening is that if I allow my security software to delete Cookies, I have to log in again.
The email thing, I don't know. I have never done a password reset for this forum. Are you are asking for an Activation Email to be re-sent, or using the "Forgot your password?" link?