Sounds annoying @walktall!
Which Multi was it?
It was
Churchdown Family Multi and now having checked it, I see why I got one digit (I think) wrong.
The additional waypoints have slightly different wording of the questions to that in the main description and I was using the additional waypoints to navigate and use to see the questions.
The one that got me was Q3:
The main description says: "How many windows in the row ABOVE the shop fronts? = B"
Additional waypoint says: "How many windows in a row above the shop fronts? = B"
Because the waypoint question said "in a row", I took that to be some windows that were right next to each other in a row, rather than, how many windows above all the shops.
I will be emailing the CO to correct the questions in the waypoints, so they are the same as the main description. Q5 has this issue as well.
Update: email sent to CO