Collections - Collapse Description

I'm setting up my collections, and some of them have quite long descriptions which make my page look messy and difficult to navigate. 

There is an option when creating a collection to collapse the description until the customer clicks on that collection. However, I'm finding that when I tick that box, the description still remains on my site? 

I have entered a Preview Description, but the full description is still showing. 

Any advice?

That option only applies when purchasing photos from a gallery. It doesn't apply to the pre-order. The Pre-order page will show the full description.