That's a partial bug in the SCLogin module. We're working to overhaul our layout system to break up the CSS a lot better than it already is. Right now, the Bootstrap CSS also includes some styles specific for our module. You can try to remove it with the code below, but that may give you some styling issues that you'd need to clean up or re-incorporate into your template's CSS.
To remove our inclusion, edit the /modules/mod_sclogin/mod_sclogin.php file. Around line 123, you'll see:
$document->addStyleSheet(JURI::base(true) . '/media/sourcecoast/css/sc_bootstrap.css');
Delete that line.
The next major release of the SCLogin module should have much better broken out styles and the option to include the original Bootstrap CSS, if necessary.
Thanks,
Alex
SC Login is loading bootstrap css even when I told not to !
