Hi,
1. By default, the plugin is configured to display 10 results on the live results list. You can change that here: https://i.imgur.com/n499NYU.png
2. It is intentional behavior and I am afraid it is not possible to change without editing the core code.
However we may change this in the upcoming release, as based on customer feedback you are not the first one to complain about this behaviour. It is very likely to be changed to “unchecked”, unless all the items are checked for the future release.