I am not sure what exactly happened but there’s something wrong with my site. For some reasons that I do not know, the cache is still there. At first I thought it’s because of theme problem. Apparently after changing theme, it’s still happen. I am still lingering around the settings if there’s anything that I missed.
Edit: Ok, now I know why. It’s because that Super Cache plugin and that plugin is still in beta version. =__________= I had to disable it. Now everything is fine.