I was active in a club and in the chat room. I clicked on the leaderboard and received a pop up message that I was not in a club and was kicked back to the main club screen where you can search for clubs etc. I search for the name of the club I was in, but nothing is returned. I know for a fact that the club still exists, is still active. I was not kicked out by anyone, in fact the president stated it is strange as it appears I was never in the club, and all my points towards the teams progress vanished. I know all this because I am in contact with a current member who is updating me via text message).
You probably want to contact technical support through the in game help section. There are many theories but they will be the only ones that can address the issue. Good luck.