Need help with the Endless Runner Tutorial

I have followed his video but when i get to spawning the corners it messes the scene up by spawning corners on eachother and its not spawning any straight tiles.
here is the video:

I will attach pictures of the blueprints in the attachments

They seem fine to me and i have gone though the video multiple times.
Maybe its because he was using 4.9 in the video and i am using 4.12.5?