One thing we've discovered when dealing with revisions is that there is something about eBay's editor that does not play well with Internet Explorer. Revisions done in that browser would have problems similar to what you are describing, but revisions done with Firefox did not.
So that may be part of it, or I did notice that neither of the references to background images in your Practice Board examples seemed to be directed to the correct locations. Do the following seem like they should be right?
Edit: I take that back, it looks like the second image is correct.