I’m saying, that the results page behavior and styling is something the plugin cannot affect unfortunately, it depends on the theme.
The plugin sends the search results to the results page in batches (10 per page, by default wordpress configuration), like the built-in search. But, if you have a custom query there, or a sort of archive module, with different number of results per page – then in that case try increasing the number of results per page here.
By default it is requested from wordpress, but if you have a custom module on the results page, it might need to be adjusted to that. If you have it set to infinite in the results page module, then try entering a high number, like 999.