Mentioned notices about xstore-icons can be ignored, it was done to speed up site loading a bit, you cna read more here – https://developer.mozilla.org/en-US/docs/Web/HTML/Link_types/preload
If you want to remove them, we can do this via child theme. Do you have child theme? Provide temporary wp-admin and FTP access.
One standard license is valid only for 1 project. Running multiple projects on a single license is a copyright violation.