Count up the no.'s under the # column & they will add up to the total search results. The total search results is not only the files found but also the no. of sources found with those files.

If you click on any of the filters to the left of the results then this will only show the total that was not filtered out. eg: audio filter will only show audio files. Artist filter will only show items from that artist. You need to select (all) to show them all again.