I did notice you have some validation problems when I ran your site at validator w3 org. Some people don't put much stock into this; but I do; if the search engines have problems parsing the page; it could effect your ranking.

I don't think it has anything to do with this problem, seeing how it does not do in the other SE, I just think overall a validated site will parse better and may index better as a result.

Then again; you may not be able to fix these problems if its your CMS that is producing them.