Viewed your site and the login is appearing at the top right and not the right side.
Basically it appears the issue you are having is one to do with the template you are using and not in the CB Login module.
Are you using a Joomla 1.5 compatible template? Joomla's templating is specific on layout positions and I am not sure exactly where you want the login boxes to appear. (Upper top area? Right Side?)
Go to this site to get an understanding of the Joomla template positions:
www.siteground.com/tutorials/joomla15/joomla_layout.htm
Perhaps this will assist you in positioning your login module. Then to tweak the box sizes you would need to go into the template folder you are using and open the CSS file for that template and look for the login section inside that CSS file and make changes there.