Thread:Unok/@comment-24494906-20140902202329/@comment-3544775-20140903220011

The episodes are added when a TV program announce it will air episode on said days. Usually they add 4-5 eps ahead, but sometimes the site gets info about the whole cour and in the last month they get info if the show will continue or not and add more announced eps or mark which will be the final. That's why the dates when the eps were added are old, but the info when they marked which will be last one is new. HxH will be 148 eps, but there still seems to not have official TV station info and that site still haven't marked 148 as last.

I'm not sure who updates the site, but as far I know, not everyone can do it. And the info comes from TV station programs, jp anime/manga news sites which posts official info, official anime sites/twitter accs, etc, not by fansites. I know that site since like 2007 and don't remember seeing wrong info there (not that I'm everyday there XD).

In reality, there is free air date for 13th episode. But that doesn't mean there must be one. I mean, the anime producers may have reserved spots for 13 eps, but that doesn't mean they will air that much. In the past I have seen many leaked information. Around the time an anime starts, some tv station site adds the show to their site and list a number of episodes and on most of these times the info goes down quite fast from the site. I have seen shows being listed as 52 eps, but ending on 50 ep (and opposite), listed as 24, but ending something between 22 and 26. Uchuu Kyodai was also listed as 50 eps by such tv station as far I remember (the show ended up having 99 eps). Sometimes there are also breaks due to Golden Week or something. And early announced number by TV station can be wrong, but usually are correct about the basic length.

A 13 ep can also be added in the BD/DVD. There is still room for 13 ep, but so far the latest info says it's 12.