Over the last few weeks I seem to be automatically added to my members groups - even ones that have been around for a long time. Perhaps they are adding me but I am just getting the 'Welcome to XYZ group' emails but I didn't join?
That's odd. Can you submit a ticket to our Support team with links to a couple of the groups you've seen this happen with lately? You can head to the Support page under your My Network tab to create the ticket.