Red and Green alert banners won't disappear. (SOLVED) [Read for solution to most of the errors and problems you may have experienced!]

Hi i noticed that once you get an error such as "User­name and pass­word do not match or you do not have an account yet." even if you log in and then log out, it will still show that alert. Everytime i go back to the login page it shows that alert still even if i haven't done anything yet. I also noticed that a user went to reset their password and when i went to the password reset page it showed me THEIR alert telling them that an email was sent to them to reset their password... I can't have it where other users can see other users alerts and password reset alerts... Please help me figure this out!

I SOLVED this issue on my own. For people with this issue, Facebook sign in issue, or invalid token issue, the problem is solved by DISABLING the System Cache Plugin. That plugin causes all sorts of problems and errors so just DON'T use it! Hope i helped everyone.