Im having a big problem. i was using w3tc and it was caching my bp activity stream which caused it to disppear,and causing conflict with my login logout for users but far as load time it was fast. i had an 86 81 in pagespeed and yslow. when i changed to wp super cache, it fixed the activity and login issue but far as load time, it slowed down by a second and my score went to 54 & 70, what was i doing wrong? is my add expire header causing the problem?