Do I have two instances of symantec antivirus running on my mac?

When I pull down the menu on my macbook to run live update, I see two instances of the same choices:

 

It looks like this:

 

LiveUpdate

Live Update

Norton Antivirus

Norton Antivirus

 

see a screen shot here: http://tinypic.com/r/33cnnue/7

 

Do I have two instances running? Is this a problem