Can't comment. Previews don't tell us anything. We need full-sized images to inspect at magnification.
Post 1-2 full size images. You may have a common problem such as dirty equipment or sensor spots that are keeping them from being accepted.
Meanwhile, review these links from your Stock Contributor User Guide
I can't detect any flaws in the first image. In the second image, focus is soft.
I think the depth of field is too shallow in the first photo.