Hi
When I mentioned hitting the button , it was in the sitemap section.
OK, great. That does not require any length of time then. And indeed the sitemap should have less images with those settings.
when it was submitted, when their crawler visited and then there is the column for read,
Assuming you have not disabled automatic submission, the sitemap is submitted when it's built. After you hit the "Rebuild" button, the sitemap should be rebuilt right away. However, it's not submitted right away after that. First you need to have a frontend visit (or a cron) to trigger this submissin background job. And then we also have an up to 5 minutes delay to avoid submitting sitemaps too frequently to search engines.
The last visit record shows when the given search engines came and loaded any one of the sitemap files.
The % read value shows how much of the sitemaps files content have been read. On most single language sites, there are only 2 files: /sitemap-4seo.xml and something similar to /sitemap.en-GB.4seo.1.xml.gz.
Usually, Google will fetch the main sitemaps seconds after it's been submitted, and they fetch the second sitemap file within minutes. But this may vary a lot depending on when they did visit for the last time for instance as they also come and re-check the sitemap on a regular basis (independantly of a new one being submitted).
Within a few days, Google should read your sitemap. I have noticed that Bing however does not seem to actually read the sitemaps, at least not after the initial read.
Best regards
Yannick Gaultier
weeblr.com / @weeblr