So on my content share view I see the two groups I’m actually a part of, plus another group that I don’t remember ever joining. When I try to look it up, I get no results. It doesn’t show up on my groups page either.
It’s called “Journey to the Tower”. What is it? Is it a deleted group? Is there a way to remove it from my content share page?
Attaching screenshot
Thanks for letting us know! It isn’t intended for you to see groups that you aren’t a part of on this screen, so we’ll take a look and see if we can get this figured out. 
If it helps in content sharing I am seeing groups where I just messaged the GM through matchmaking for information about the game. These groups are listed on my matchmaking screen as ‘Connected’
That is helpful. Thank you!