It's simple: on the all pages but the first you have "fm=off" parameter, so first page is searched with word forms turned on (and so 'plums' is also found together with 'plum'). On the second page I see 'fm=off' parameter, so 'plums' are not accounted and there are only 14 results.
Seems there's a problem in your configuration (searchd.conf and/or s.htm). PS While I supporting you with your ASPseek-related problems, please support ASPseek by putting "powered by ASPseek" button on your page, with a link back to http://www.aspseek.org/. -- -- kir
