After putting all the clips from one event inside the events browser into several keyword collections, I found there were still clips in the the event even after I chose the "No Ratings or Keywords" drop down menu. From what I read, this menu selection should have been empty if I assigned everything in the event a keyword, right? So why are their still clips in here? And duplicates as well.

Also, when I open some of the keyword collections, there were more files than were in the event. I don't know how clear this is, but can anybody shine some light?
Thanks.