How to correct a public posting with a rack link:
First, delete the original link out of your thread.
Next, go back to your build's page. Refresh it. Then open the "Screenshot" under the "Show" menu. If this doesn't show the right version of the build, refresh the screenshot. If it STILL doesn't show it, go back and check the build. Then refresh again, do the screenshot again.
Once the screenshot AND the build are identical, go back to your original post and put the link to the BUILD PAGE (and NOT the screenshot) back in. When you go back to the thread this time, you should see the image where the link was replaced in the post.