Major Description
When editing a page from Portal Site Manager removes the Document Order.
Looking at the code, it looks like AbstractPageManager.java
updateDocumentOrder() is called everytime the page is updated and if the
page is already there in the document order list of the folder, its removed.
documentOrder.remove(name);
Change the above code to the following fixed the issue.
if ( !this.folderExists( name )
{
documentOrder.remove()
}