Why does Facebook keep saying I've liked some pages when I haven't?

[mousekat]

Whenever I look at the pages I've recently liked on my profile there are pages that I didn't like. And when I go onto the page I see that other people have written that they didn't like the page either. Does anyone know why this is, and how to stop it?
My password hasn't changed, and I looked at my recent log in sessions and they're all from me. And the only app I have is Candy Crush, I don't think it would be that.. and I know I didn't accidentally like the pages, because once I noticed it was happening I've been keeping an eye on it.

It's really weird though, it's not just happening to me. Because as I said, other people have been commenting on the pages saying they didn't like the pages either. They're all new pages too, created within the last few days.

[Huhoo]

I never met that problem before. Perhaps you accidentally clicked the Like button on some Facebook pages.

[Nivarp]

Maybe you got hacked?

[Intellectualpear138]

When you sign up for "free" stuff on Facebook like games or you Like certain pages you are giving them permission to do all kinds of things including liking other pages for you. Read the small print.
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[Daniel]

When it Says Things that you have Liked When you Have not Thats Because Someone Has Hacked your Account and Did it Change your Password and Check your Apps And Delete Anything that you Did Not Authorize to your Account if There Are Any In There