Check the "hide confirmation box" at bottom of treasures page- it will then use the 7days scrolls. The draw 10 will remain red but you can still use it if you have enough of timed scrolls.

That means you didn't have enough scrolls- like i said, you c*e it if you have enough to draw. It's common sense to keep in mind that if you check to not receive confirmation before draw- you wont be notified that you don't have enough scrolls so coupons will be used. Check amount of scrolls before you draw.