Security and Backup / Norton One confusion

Hi,  

I just resubscribed to Security and Backup (S & B) but I am concerned. I used to have Norton One and even though the new S & B is telling me I am protected the Norton one is telling me I am not and should move on to Norton 360. I have two problems - Why is Norton 1 still there? And why did I get moved to S & B when Norton One is telling me to go with 360?

Do I have the same protection or have I bought the wrong product? Do I need to buy other packages?

Thanks in advance for any info that will clear this up for us.

Don