The SCLogin module doesn't have a drop down like you show in your image. Does your template have a module position in that login drop-down area that you're putting the SCLogin module into or something? We need to understand what you're trying to do more to help you get things going.
For this site, the top right area is its own module position. It's not part of the main menu at all, it just has a small amount of styling to make it look like its part of the main menu area.
I hope that helps explain some, but if not, let us know more details about your configuration and how that drop down works in the first place. Also, if there's a page you can point us to to see things, that would help us understand the issue more.
Thanks,
Alex