Hi Larry,
Sign in to Yahoogroups and look at the list of your groups on the left. Scroll down untll you see "All My Groups."? Click on that.
On the page with all your groups listed, find Membership Wizard at the top righthand column. Click it.
Mine says "Sorry, We could not find any unclaimed memberships using the email addresses below" so I cannot really say what you might see.
A friend who owned a list and could not get on it was able to get back on her list as owner by going to the Membership Wizard. Perhaps there was an unclaimed membership? When I was looking to move that group, my friend's?new "Yahoo ID" was in that group's members as was her old one.?
Hope this works.
-Betsy?