Adam, wellcome to avast forums!
Like Artras said, could be normal or not having only one icon:
On Windows XP:
1. The 'i' icon could be hidden like any other (click on the triangle on the left of the system tray).
2. You could merged the 'i' icon with the 'a'. VRDB (the 'i' icon) will be a sub-menu of the 'a' icon.
On Windows 98 or Millenium:
1. only the second above