Anyone have any idea why, when I access Facebook, almost all the received posts are duplicated? [View all]

This is a pain in the neck. I view a post, scroll down a few, and the same post shows again. Don't even know what to call it but these duplicate listings are a pain in the pa-toot. I am not very active on Facebook, just family, a few friends and a few sites that I enjoy. No big list of things to see, I just don't want to see them twice at the same access time.

Thanks,
PR