How to remove "watched" movies on facebook?

[Josh]

A few days ago i starting rating random movies out of boredom on facebook, and all of the sudden when i look at movies i watched, it says i have 100+ watched movies that I used to watch. My god, my page looks like a kid's page now. I tried everything: I went to my Activity log but there was absolutely no evidence of rating movies whatsoever, I tried clicking the edit button on the top right corner of the movie thumbnail but whenever I click delete it always says:

The content you requested cannot be displayed right now. It may be temporarily unavailable, the link you clicked on may have expired, or you may not have permission to view this page.

So i dont know whats going on...for now i just "hid" my entire movies section..so frustrating...