How to reset my password if I forgot it?
While you can change admin password either by drush or by running mysql query if you have access to database if you do not have direct access to your mysql server, install devel and wrap the mysql query with drupal query wrapper functions and run it at /devel/php page.

You may want to consider having nocurrent_password module which removes the current password field and you can directly update your passwords, NOTE: this behaviour will be same for other users as well.