First, the logon page won’t let you logon with Facebook. Clicking the Facebook button just sends you back to the logon page. Second, there’s no subtitles for A Certain Magical Index. I’ve been watching the series subtitled with the original Japanese audio up until now.
It’s sad Funimation won’t let you bring up these problems on their forum. They want to hide the fact their site is broken. No one at Funimation has responded to my email.