Some folks are getting in a password loop where the system asks for their old password, which they have forgotten or misplaced, when they are trying to reset their Commons password. This is happening because they are still logged in to the Commons. Usually this is because their browser remembered the old log in even if the user didn't, and kept them logged in.
If this happens to you, make sure that you are "outside" the Commons when using the emailed temporary password. Specifically: To reset your password in the Commons: