I do kinda agree with you that some may have had an unfair advantage, but then I think OCR's argument will be that they do recycle questions a lot, even if it is word for word, it was first asked 9 years ago.
I really don't think they will change the grade boundaries drastically due to this though, that is if they take it into consideration at all. :\ Which I find quite unfortunate, because I took this paper too. But honestly, I didn't even realise it had come up before until everybody began mentioning it.