Formatting can be a bit wonky with pasting stuff in to the WYSIWYG editor, as not all the invisible formatting code from Word is recognized by the editor. I think you can get around this by first saving the document as a txt file, then pasting it in. I think that should strip all the formatting that would cause problems. You could also try switching your editor temporarily to either the basic or standard editor. I'm not sure about the latter though, so I'd recommend trying the former first.