Hi,
1. That is probably due to a min-width attribute, which is set to 200px. It is added in the lite version too, but it probably did not apply. You can disable it via this custom CSS:
div.asp_m {
min-width: unset !important;
}Then set the search width back to the default 100%, and then the builder width will apply.
2. It looks like the results page? I’m afraid that is not caused by the plugin, it can not affect the layout of that page, nor what exactly is printed there. You may need to check the theme settings.
3. You can exclude items here.