Hi there some of our fellow Chaosian are having trouble with the app more to the point they can't join the clan from said app. If you're still struggling fear not. If you use your web browser and go to this web site http://www.bungie.net/en/clan/402100 once loaded look for the clan logo and under that you will see a button that says interact click it and hey presto you will see join clan. The only thing left to do after that is wear your Casual Chaos clan tag with pride happy hunting.