ArcheryGB activating online account

Sooooo...........

my ArcheryGB card arrived this morning. The attached info said "Please activate your online account".

So I went to the address given and followed the on-screen instructions on the site and set up a log-in. So, I have a Sport:80 dashboard; there is no membership number; odd I think so I try to add it. It starts trying to make me a direct member and telling me what it's going to cost.

So I guess there's something wrong; it's obviously not linked to my existing AGB...

ArcheryGB activating online account