Very strange indexing problem. Gurus Please look!

So one of my websites www.layoutpimps.net recently lost a ton of rankings in Google.

If you search Google site: layoutpimps.net/layouts you will get this result:
http://www.google.com/search?q=site:layoutpimps.net/layouts&hl=en&start=0&sa=N

You will notice the 5th link down is Fashion Layouts.

now if you search the exact Fashion URL in Google: layoutpimps.net/layouts/fashion/index.php

You get this result:
http://www.google.com/search?hl=en&q=layoutpimps.net/layouts/fashion/index.php&btnG=Search

It says you're search did not match any results.

Well what's going on? Clearly in the first search the fashion index.php page is indexed, but in the second search it is not?

This happened to almost every single one of my keywords. Hundreds of them. They are showing up if you search layoutpimps.net/layouts but not if you search the exact page.

Please help. I know this is why I've lost all my rankings.

 

Just noticed that if you search in Google,
site:layoutpimps.net/layouts/fashion/index.php it will show up

so does this make a difference?

 

Yes, it makes a difference.

The page in question is indexed and cached btw.

 

There is a serious issue on dropping PR due to selling links..

 

I don't care about PR. I lost SERPs, not PR.

 

I can see it now.
I can see it by adding the link: before the URL..but the URL alone don't have any result..