I had before, but let me do it again and post plenty of screenshots to visualize what I am doing.
I thought that user shares are created automatically? At least that's how it works for all my folder on the array. I create a folder on any disk on the array and it turns into a user share. As you can see from my screenshots above, the folders on my pool device do not show up under user shares,
What I have done now is to create a folder with the same name on the array (on disk 2). I then changed the user share setting to include the cache. When I access the folder on user share, the file in the folder on the pool device does not show up. See screenshots below: