Search result in www section and diplay in admin section are being governed by the same MAX_DISPLAY_SEARCH_RESULTS value. When you choose to display just a few (eg.2) results on www (for design purposes) your admin section becomes unlivable - try to go through 100 plus customers records when only eg. 2 are being displayed on the page.
This little trick separates them and ads aditional option field in configuration/maximum values (Admin section item display number) -
I did it from admin perspective - but if you want to and you know osCo, you can just change product_listing.php in catalog/includes/module - you must then also change *.sql file to match.
If not do as I did.
Explanation what to do and where in admin display.txt.
Do not forget to load up *.sql through phpMyAdmin
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