I have been running WP Smush Pro and haven't gotten through all the photos in my library (over 1000 images). But I went back to look at some photos that have been optimized. They still show a file size of 1 mb and some are more than 1 mb. I thought the Smush Pro compressed them below the 1 mb level. Are there other settings I need to select under the Smush settings? I have many, many photos that are 1mb or greater.
Also, will the changes to the photos in my WP media library carry over to the photos/images in my posts and pages? Will I need to go back on my individual blog posts and delete/reinsert optimized images from the library? Or do the changes to images in the library automatically change the images in my posts/pages?