Gallery theme blog content template - excerpt not working?

On the page which lists all my posts, I'd like to only show the excerpt of the post instead of the whole post. I followed the instructions here:

https://premium.wpmudev.org/project/excerpt/

However, using both the Excerpt section into which I can paste text, and also using the "insert more" option, I am still getting the full text of the post. What am I missing? Thanks.