Why you are part of my prof network on linkedIn - and yet not be part of the Smarter Marketing Subgroup.

I have members from my persoanl network who I invited to join the sub-group and who have already accepted my invitation and joined are not listed as a current member of the sub group.  There is a problem somewhere

Response from LinkedIn - Yes, in fact, you've encountered a known issue where the 'Join' button is not functional in the invitation. I'm very sorry for the inconvenience. Our engineering team is working on it but there’s no estimate as to how long that might take. We’ll do our best to keep you posted.

Sorry folks.

Dr Brian