If you have won more then one award fjbfour has made you a legacy banner. The reason for this is to make the sig line smaller with several awards. I have replaced some sigs already of people who had there awards displayed. You can view all past awards at the link above.
If you want to add your legacy banner to your sig copy and past the URL at the link above in to your sig line. Do not select host locally (small box below url bar), That way if you win again when the image is updated on the server it will automatically be changed in your sig with the new award added to your past ones.