General Options -> Limits
For each results group there is a separate opion to control the live results list results count, as well as the results count on the search results page.
When this option is enabled, the number of results (post type results limit) is distributred within the selected post types. For example.: if the limit is set to 10, and you have posts and pages selected, then the plugin will show at most 5 posts and 5 pages as results.