Rule 11 ou 18?

Well i am a bit confused about that situation at this trap on top mark, please help.
https://www.youtube.com/watch?v=SQG5scfHMrc&feature=youtu.be
https://www.youtube.com/watch?v=SQG5scfHMrc&feature=youtu.be
Match Racing, Team Racing and Fleet Racing
https://team.vsk-match.com/forum/