My site is now

My site is now getting a decent rating on GTMatrix but everything is crazy on our site, I need help. Our buddypress newsfeed or activity disappears , the CSS was changing on every part so I unminified the css and theme files ... our Mastersliders do not show up at all on any pages. I keep resetting and configuring and i'm ready to scream. I have too many students live on this site for this stuff to happen. 404 errors at everyturn... please help. I was excited to see the load speed score increase but its been one headache after another.