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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: https://www.youtube.com/watch?v=E8D3TMvrYiM&index=6&list=PLZlv_N0_O1gbY4FN8pZuEPVC9PzQThNn1

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?