As 2018 is coming closer we have posted everything you need to know about our next Eurobricks Event. You can find all information and the sign-up topic in our event forum.
Eurobricks Event 2018 - Information Topic
I counted them in the official instructions - there are definitely 10 of them. I literally flipped through all the pages of the PDF and counted them up to 10. It seems that you must have assembled incorrectly or lost them in disassembly.