XF 1.3 Node icon troubles

Hi i recently had purchased xenforo and had no idea what i was doing so played around with it, i now have the ability to change my node icons but im having this issue ( in the pic ), i cant delete the icon that are small and black ( as shown in the pic ) so when i uploaded my personal created icon it simply sits next to the icon that was already there... how can i delete the other node icon so just my logo icon is there?