I've never heard of that issue before, and not sure what would be causing you to have to hit Apply twice.
Can you let me know if you change settings, hit Apply and nothing changes.. try clicking the "Social" link at the top again to see if the changes appear properly then? It may be a loading issue where the settings are actually saved the first time, but not shown until the page is reloaded.. again. We can obviously look into the cause of that, but the above feedback will help narrow things down.
Thanks, and sorry for the minor annoyance,
Alex