Quick question: Yoast’s Sitemap tool picks up all post images without issue. However, I notice that it never reads more than 2 images in any portfolio post type. Therefore I am not telling Google WMT about the correct number of images on a page.
Most portfolio sliders (2 per page) contain 9+ images but no more than 2 ever appear on Yoast’s sitemaps.
Before I ask them to look at it can you confirm that ALL slider images can be read by a sitemap crawler?