Nat, I don't know why that is happening - I just checked and the email address that Paul signed you up to the group for is
saki...@gmail.com, and that's the address it showed the doc is shared with.
I'd try closing your browser all the way and reopening it, clicking the link, and making sure you're logged into Google with the
saki...@gmail.com email address (even though I know it says that below).
=Drummond