then you have hits (in my example 75) and several pages as results. In my example there are 2 pages and if you want to access it by klicking "next" or by "2" you get:
Helios are hosting this on a 13-year-old version of phpBB, so there's not much one can do about these sorts of problems unless they upgrade the forum software, which isn't going to happen.
and I hope you figure out how to change both parameters accordingly.
In your specific case (2 pages results) however it's enough to just change the sort order direction, so a search query gives you either "end" of results first.