Why is the submit button still not aligned?

You probably copied a CSS snippet that was customized for someone else's site. You can use those, but you have to adjust them so they work on your site.. it wasn't intended to be a generic fix.

Remove the previous CSS snippet and try this. You can adjust it if needed to suit your preference.

[css]
/* make the form container relative for positioning */

body #gform_wrapper_8 {
    position: relative;
}

/* set a width on the form body so the button has room on the right */

body #gform_wrapper_8 .gform_body {
    width: 485px;
}

/* resize and re-position the form footer with the button */

body #gform_wrapper_8 .gform_footer {
    width: auto;
    position: absolute;
    top: 80px;
    right: 16px;
    padding: 0;
    margin: 0;
}

test screenshot: http://bit.ly/p2yx7T

You didn't copy the CSS snippet completely.. the first backslash is missing from the first comment and the rule for the form wrapper isn't being applied.

screenshot: http://bit.ly/opdAan

Wonderful. I'm happy I could help. Thanks for the update.