In search results like you provided "page" variable doesn't really means the relocation page. When it's passed to the search script, it means the post ID, and only when you click
on the search results link, the script calculates the topic's page where to go and forwards you straight to the message user has been posted. This is done that way, because calculating the proper page via the search process stands to impossible if we want to achieve the fast speed.
You can check on our forums for example searching by my name
and see what it means.
I see on your forums it doesn't work properly, but I'm not sure why is that. Try to upgrade your miniBB to the newest release or at least the file bb_func_search.php