When entering a number of results to limit the search pages by, there are actually one more result on each page. Select 5 and you get 6 results.

This is actually added in the code in the variable GrabLimit but I cannot see why. From my tryouts with this it just means that there will be one search result too many.

One result is always added to the limit to see if we need to display the next page link or not. So, if you specify 25, we grab 26 to see if there are enough results to need that link. However, it looks like I'm not quite displaying things properly.