My Available installs is wrong - how can I fix it?

I just downloaded a second copy of Norton 360 but My Account is saying I have no available installs, when there should be one left.  Can this be fixed? How can it be reset to show the correct number?

I just downloaded a second copy of Norton 360 but My Account is saying I have no available installs, when there should be one left.  Can this be fixed? How can it be reset to show the correct number?