You need to remember that under the # column of the search results that this represents how many people were found with that particular file. So even though there might be 200 results, & only 50 show, there's probably some files with many sources. eg: it generally shows the most popular file at the top of the search results. Have a look under the # & there'll probably be 10 or more users have this file. So if the 1st 5 files on the search results have 10 sources each, then that's 50 because it represents 50 people or sources. The total no. under the # column will equal the total search results.