You sure you didn't fire 10 shots in the first card.
Just one of those things i think fella, I had a nice 3 shot clover the other day all in the 10, was so pleased left that card alone and put up a fresh one and shot 8,7,7,8,6.
I know i was just lucky, otherwise i would be shooting high 40's all the time.
But it's that bit of luck now and again that keeps you trying to make yourself better.
Jason