[ferretchucker]

the producers cut has the original ending which left the whole thorn thing open and left a way for loomis to come back in, then pleasance died and they had to very quickly make a new ending which is the more widely know halloween 6.

I just got confused when i found out that the makers of h2o made it in a way where 4, 5 and 6 weren't meant to have happened.

In the producers cut, apparently Jamie also dies a lot later in the film and it had a different ending. Bear in mind this copy you have is the original story. I think the quality may be because i don't think they had completely finalised it when they had to redo the ending, so the producers cut was just sent out from where they finished work on it.