Hi,
1 & 2. No, it should be all right. At cetain number of search instances, the plugin switches to a anyhcronous CSS loader feature – to only load the assets for search instances on the actual page. This is a very handy feature, and can be excplicitly enabled here: https://i.imgur.com/KoWlbpS.png
Also, you can use conditional asset loading: https://i.imgur.com/b3KTL0O.png
That allows completely including/excluding every asset of the plugin on selected pages only. With these tools you can fully control the asset loading. I recommend leaving all the other options on the compatibility options menu as they are by default.
