Secret Settings Shaders Not Working and Anisotropic Filtering Only From OFF to 2

When I enter a world, regardless of it being single or multiplayer, whenever I enter "Video Settings" and press "Super Secret Settings" all that happens is that it plays a randomized Minecraft sound, but nothing else. No shaders are activated what-so-ever.
Also, my anisotropic filtering only goes up to 2, not the usual 16.