Renas,
I'm not a CSS guy either. That's why we don't make templates
I honestly don't have a Windows computer in front of me right now, it's the weekend, so I'm on my Mac exclusively. A few possibilities to look into:
* In the /components/com_jfbconnect/assets/jfbconnect.css file, remove the "width:100%" from the scsocialbuttons class. That may be why IE is having issues.
* Try using "float:right" instead of the absolute positioning.
I'm not sure if that will fix everything you're looking for, but worth a shot. The absolute tag can be very picky in many browsers, and I simply don't know the best way to fix that in a widely compatible way.
Hope that helps you make some progress,
Alex