I have found on the ebay posts that it is happening when we are editing BULK listings (more than 10). ex: editing listing to put into store categories. They say if you edit less than 10 at a time, it will be ok. Have to edit the screwed up listings one by one and re-weigh....BAD NEWS. I have spoken to ebay and auctiva and it is an ebay problem, not auctiva, and they are 'working on it'.