.hack//SIGN collection missing 28th episode? (no spoilers)
so i was thinking about buying this show. i remember seeing it on adult swim but was too young to understand it, even though i loved watching it. and i just recently started watching it and got up to episode 8, and it is FANTASTIC. my adobe flash player unfortunately though was uninstalled so i can't continue it. so since i liked the show anyway i was thinking about buying this set off amazon.
http://www.amazon.com/Hack-Sign-Legends-Complete-Collection/dp/B000FJH 4YQ/ref=pd_bbs_sr_1?ie=UTF8&s=dvd&qid=1211561773&sr=8-1
but i've read some of the customer reviews and they've said that this collection only contains 27 episodes, when there are in fact, 28? is this true? and is there any particular reason for that? like, was the 28th episode originally an OVA or something? any help would be appreciated. thanks in advance.