christofu,
Please PM me the credentials. You can click the mail icon under my name to the left and send them.
We'll gladly take a look and see if we can help you with some of the issues you're having above. Another thing to point out is the Theme option in the SCLogin module which has two settings of "Default" and "SourceCoast".. switching between those may get you closer to what you're looking for.
For modifying the SCLogin themes, please check out our
Joomla Login module styling
page.
I hope that helps,
Alex