A question about Goblin soundtracks

Hi
I am a bit confused about the releases of Italian prog band Goblin,especially their soundtrack for the movie Patrick.The CD says Original Motion Picture Soundtrack as does my US LP for the same flick.The music is completely different though,with Goblin providing the music similar to their soundtracks for Dawn of the Dead,Suspiria and Tenebre and the US LP being just a collection of snoozy orchestral music.Both releases state that this is an Original Motion Picture Soundtrack.Which one IS the original and how to avoid the confusion in the future?(I picked up the LP thinking i'm getting Goblin on vinyl for the cheap)Any clarification would be appreciated.