Matinee bug or user error?

I’m simply trying to make a group of static meshes slide to the right with a box trigger. I followed the tutorial perfectly but for some reason the static meshes warp into a different shape. Any ideas?

All the pieces are selected for the matinee in the level blue print but only those warped 2 appear
Level BP

help please

at first sight you haven’t define your “in parent actor.” Maybe the reason why other meshes don’t move in the right way. I am absolutely not sure this is the reason but in hope it helps.

Would it be possible to do the same thing without attaching actors? I dont really need to attach anything, I just copied the tutorial. How would you go about making the L hall slide over?