Using WP Search

I am using wp’s in built function to search my blog. When I do search it, it will bring up blank results and then often it will bring up a number of the same results. It doesn’t do this for all searches, just for some of them.

Any ideas or help would be greatly appreciated.

http://www.theflattleys.co.uk/cfblog/?s=crittenden

That link will take you to one of the searches I am talking about.

Many thanks