The insert multiple records Server Behavior is the one that appends the value based on which form elements are in the repeated region. Is it possible that the repeated region was around the entire form when it was applied? The page is fixed for now, but I'm going to have to debug the cause and find out if there is a bug that I can fix. In the meantime if you try again and have issues, send me the page and I can fix it and walk you through how you can fix it moving forward.