Curator only pulled in 25 Posts. Can I go back further?

In short, No you can't go back further :( 

Unfortunately, due to recent API changes, this is no longer possible for particular sources. 

We limit this first update to reduce strain on our servers the first time a source is added- Some sources/hashtags have thousands upon thousands of photos. 

After that, each time the source refreshes, it will pull in up to the same limit of 20-25 new/latest posts that the source can detect, keeping your feed updated with the latest content.

For Facebook Page source, Instagram Business Account source, and Flickr Album source, users on paid plans can contact us at support@curator.io. We can manually attempt to load those other or older posts that weren’t pulled due to the initial cap.