How can I eliminate my first sign in that pops up? It's incorrect. My second sign in choice is the correct one.

*Click the (empty) input field on the web page to open the drop down list *Highlight an entry in the drop down list *Press the Delete key (on Mac: Shift+Delete) to remove it. *http://kb.mozillazine.org/Deleting_autocomplete_entries ---- *http://kb.mozillazine.org/Password_Manager *https://support.mozilla.com/kb/make-firefox-remember-usernames-and-passwords