Don't let them upset you EK, you do a great job with your quizzes and if we were all perfect it would be a really boring world, wouldn't it?
I remember the first quiz I set for 'Children in Need', I repeated the same question twice in the quiz and despite numerous attempts at proof reading, completely missed it. It was funny to see all the attemps at trying to come up with alternative answers to the same question !!
Keep up the good work and I look forward to receiving my entry back, hopefully without lots of your red pen all over it.