If you got an email to join two Survival groups, please note that group ID #9477 is the one to join. You may have got an email to join group ID #9476 and that one is incorrect. So,
ID #9476 = incorrect
ID #9477 = correct
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If you already signed up for #9476, you can leave the group by going here:
http://football.fantasysports.yahoo.com/survival/
And finding the "Leave a group" link kind of in the middle of the page and clicking on it. 9476 will be the first one on the list (i.e 9476 first listed, 9477 second on the list provided you joined both groups).
Sorry about the confusion.