Ok Warren you have seen my questions thre times but you failed to post them so i will ask them a fourth time and all you have to do is use a two letter word
<<<1. Prevent Duplicate Invites Have a simple memory "cache" set up within each Group, that would prevent the same Yahoo! ID or email addy from being invited
... email ... yes, but can regular members receive that email? I have many members of my club who welcome new members whenever they see them in the stats.
In the club you could invite people without having to know their email address ,just their yahoo I.D. I do hope this will be a feature in the groups as well.