Hello,
Be sure to read the instructions on "replace MAX_DISPLAY_ADMIN_SEARCH_RESULT constant with standard MAX_DISPLAY_SEARCH_RESULTS in admin/faq.php.
Next, change the following line for split_page_results.php file in both include/classes/split_page_results.php and admin/include/classes/split_page_results.php:
$this->sql_query .= " limit " . max($offset, 0) . ", " . $this->number_of_rows_per_page;
Change it to:
if($offset <0 ) $offset = 0;
$this->sql_query .= " limit " . $offset . ", " . $this->number_of_rows_per_page;
This should do the trick and I hope that helps. Good Luck =)