I did the short story for the pre and genuinely thought it was very good. I had written a similar one in class and my teacher thought it was brilliant. However, I only received 46 out of 100 for it in the pre. Now I'm not sure what to do for the real thing because I don't know if I could have written a better story. Are stories marked harder? Or were the pres just marked very hard in general? Or should I go for a different type of writing in the real thing?
I had the same experience. Used a short story I had written in fifth year but managed to change it a good bit to fit in with the title. Only got 60/100 despite getting an A1 before. Perhaps look at the marks you got for purpose? Is it definitely relevant to the title?