Will cancelling my application hurt my chances for next year?

I got an offer from Glasgow uni which was conditional on me getting AAAA in my highers this year. That is the uni I really want to go to. However, I struggled with my geography assignment and didn't perform well in my exam, so I think I'll be lucky to get a B. Therefore, I decided to play it safe and choose an AABB conditional offer for my firm, and an ABB conditional offer for my insurance - both from good unis, but not as exciting to me as Glasgow.

My idea is, if my results arrive and it turns out I did achieve AAAA after all, I could cancel my application, and then apply to Glasgow next year - if they don't accept me, surely one of my other choices from this year would.

My question is, if I do cancel my application after results day, will the unis see me as a tease? I know that interest varies year to year, so I won't be guaranteed any offers, but will this specific conduct hinder my chances when applying next year?