Shal; thanks for that. Anyway as you have probably spotted I have transferred this to the beta group so it is now simply a question of "wait and see".
I sincerely hope some alterations can be made to the notifications because IMHO it will reduce the confusion that arises and make managing the overall situation just a little bit easier for both Owners / Moderators and Members, particularly for any groups that migrate from Yahoo in the future. Groups.io is a much nicer platform than Yahoo and if it can be made better still then so much the better. By all accounts Yahoo was completely impossible to negotiate with over matters like this.
Chris