When i add component to blueprint it shows up blank?

I am using UE 4.10. I deleted a component so that i could re-enter it using a different component. and now everytime i add components into my blue print, the component shows up blank, no variable name or link.[alt text][1]

Endless Runner: Spawning the Course | 02 | v4.7 Tutorial Series | Unreal Engine - YouTube i am using this video to create a running game. my second problem is all my tiles are spawning vertically not horizontally. I have identified my index correctly and set up my arrow correctly.

if you can help with either question it would be very helpful, thank you.!