Preset colour themes not working

Hi,

My site at http://www.angles.co.nz I’ve tried selecting different colour themes but none make any difference to the look of the site. Plus there is a grey overlay that draws over the site once loaded. Help please? going nutso here.

The frontpage is static with blog embedded. I also can’t get rid of the blog date etc. details under the title even though they aren’t present in the blog page itself.

Hope you can help.
Josh