for W3c validation

I’ve still been struggling to figure out why my blog appears to be penalized and I think I may have (finally) found something. Take a look at the page descriptions here. I don’t see the same content on the actual page after clicking through, so I wonder whether a hacker put some sort of cloaking script on my blog that shows Google something different than a person? How do I find this in my wordpress theme file and remove it? Any help would be greatly appreciated.