There is always a downside when it comes to simulcasted anime… It always has a potential that the show would leak to the masses before the airing of the show in Japan. This exact situation happened to Funimation when they were streaming One Piece Episode 403 back in June of last year.
Ironically, ANN cannot escape the same treatment since the leak of Ore No Imouto Ga Konna Ni Kawaii Wake Ga Nai. The second episode of the mention series leaked a day early, which could explain why some of the people are reviewing that said episode a day early. Well, ANN is now investigating the issue so it won’t happen again. It makes you wonder about the security used to protect these streams so that it won’t leak like that.
Update: It seems that the simulcasting of OreImouto is permanently suspended… Yeah, ANN pretty much betrayed the Anime Fandom and hopes for streaming being a better alternative.