Facebook share button does not send the correct link

Good Morning

On my webpage: http://www.piping-world.com/pipingworld/index.php?option=com_easydiscuss&view=post&id=1&Itemid=843

When i click on share the discussion the link sent to facebook has an additional subfolder "/pipingworld". Can you please fix this.

http://www.piping-world.com/pipingworld/pipingworld/index.php?option=com_easydiscuss&view=post&id=3&Itemid=843

Joomla has eXtplorer installed from where you can directly access the folders and files.

Also EasyDiscuss layout breaks in Internet Explorer 8 and 9. Can you please also fix this

Thanks
Rajesh Naik