So Weerbesu has kindly provided a temporary fix here:
He also explained this is a BUG, so please EA can you fix it?
"I believe the game is supposed to remember whether the last opened tab is Clubs or Organizations for each Sim when you close the game so that the next time you open the game it will show the last opened tab. This setting is saved to the UserSetting.ini file in your The Sims 4 folder as "clubpaneltabsetting" for each Sim. However, due to a coding mistake the game always saves the wrong tab (i.e. if Clubs is the last opened tab it will save Organizations to the UserSetting.ini file, and vice versa). I've fixed this bug, as well as making Clubs the default tab when no value is saved to UserSetting.ini. You can download it here and test if it works. Please note that it will conflict with Neia's More Clubs per Sim mod."
PLEASE GO AND ME TOO THE BUG REPORT SO WE CAN GET THIS FIXED!!!!
https://answers.ea.com/t5/Bug-Reports/Social-Panel-INCORRECTLY-saves-last-tab-always-saves/m-p/9817380#M167319
(Removed mod link, no mod links on AHQ) - Atic