New Password Link Error

Hi, I am not able to get into several of my WP blogs that I know have the correct login because they have worked many times before. I have them auto inserted by Roboform and I also have a backup on a secure file that I copy and paste.

1. Do WP make passwords invalid if not used for several months?

But also, when I attempt to change the password (and this has happened many times before) when I click the link in the email, I am taken to the page where I have to input my email again, NOT the one where I put a new password in.

I have just sat here and put my email in, clicked a link and been taken to the same page over and over again.

Something needs to be done about this because it is a very annoying bug that has been around for a while.

2. Why does this keep happening?

thanks