Is it a mistake?

[The Last Bottlecap]

I think I found a mistake.

Chapter Twenty-One is called 'The Heart of Twilight Sparkle', but at the odd pages's top left corner is typed 'Patterns of Behavior'.

Or I just had a sudden IQ loss (happens to me from time to time ).

Books are still awesome, though!

[SeraphPL]

I believe it is. I checked mine copy and it's printed the same way.
Well, all I can say is:
And you're right, the books are phenomenal!

[The Last Bottlecap]

Yeah, I also think this IS a mistake, but when I'm writing on Internet I'm constantly terrified of insulting someone or causing not-nice misunderstandings, so I don't use 'sure' words like 'never' and I read my post three times before submitting it, which leads to dumb yet kind questions in topic subject.

Wow. That was a hell of a sentence.

Also, brohoof to you, fellow-countryman! /)*(\

(I got the 'fellow-countryman' word from Google Translate, so if it doesn't fit, it's Google's fault.)

Am I really off-topic... ing ( )... my own topic?

[zemming]

My bad

Books are still awesome, though!

That's what counts

[Jusey1]

I didn't notice this mistake. Oh well.