Drag and Drop

CaitlinGregory-​ : 

I suggest you let Storyline's automatic functionality work for you. 

Set Feedback to By Question. 

Storyline will automatically add the Correct and Incorrect layers.  

You can edit those layers to show the same content that your custom feedback layers show. 

First, apply a Blank layout to each layer.

Delete all the unwanted content. Then copy and paste the content from your custom feedback layers.

As needed, adjusted the Slide Layer Properties to display them as Dialog layers (that is, blocking the player) or as regular Layers.

Delete your custom layers and the triggers that show them. No triggers are needed to show the Correct or Incorrect layer, because that's built into the Submit trigger.