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Spawned Child Actor behaving different from original BP

I have a blueprint with a mesh moving along a spline. I added the spline first, then the sphere.

http://i.imgur.com/AexM5Tfl.png

This blueprint is added as child component in my vehicle blueprint and spawned correctly.

http://i.imgur.com/7vkqIHRl.png

The problem is that changes made to the spline don’t affect the spawned child actor.
Basically I dragged the first blueprint in the scene and modified the spline but the spawned child actor still follows the default spline.
What am I doing wrong?

it not exactly the answer to your question , but here is something i noticed :

Child actor component doesnt follow it’s parent transform “at all” . what i did to fix my problem was , i used an “Attach to” node in the construction script , to attach it to the parent’s socket that i wanted.

But even this doesnt work if the actor already exists in your level when begin play , this only works when you are spawning the actor during runtime .