your form tag:
<form class="form-vertical login-form" name="LogIn_Basic_Default" id="LogIn_Basic_Default" action="login.php">
does not include a method attribute.
this will cause it to use the GET method, this is why the submited info is in the URL, the GET method uses the URL variables.
change that to use the POST method insteadL
<form class="form-vertical login-form" name="LogIn_Basic_Default" id="LogIn_Basic_Default" method="post" action="login.php">