Thank you, that worked!
Okay, so I have checked, but the search bar in the header is not coming from Ajax Search Pro, so by default the core WordPress results will be triggered. When I try searching via the plugin search, then it seems to be okay.
If you want the default search bar in the header to trigger the ajax search pro query, then you can choose a default search bar override here. That will force the results from that search bar even if the results page is visited via the default URL or search form.