Visual of photos in Bedford Blog at slug /blog

Site URL: https://overCurious.org

I'm relatively new to SqSp blogging but publishing for 3 months now. For this site I'm using 7.0 and bedford template. I discovered a visual effect that I love but can't figure out how to control it the way I want.

Check out https://overCurious.org for my working example for this question. You'll see I have a couple of Categories and some Featured posts. My navigation setup never directs the user to: https://overcurious.org/blog itself because I present the user Recent and Featured posts as summary blocks on the Home page. No problems so far. 

I accidently went to the /blog slug myself this morning and noticed this cool visual effect in which the top of the page (it's banner?) is a gallery (terminology?) of 5 of my post banner images and there are left and right arrows to scroll through the list of 5 posts. Cool. I like that. But have spent an hour trying to figure out how it (SqSp 7.0 or Bedford) picked which 5 posts. For a moment I thought, oh, this is my list of featured posts. But it's not exactly cuz there are 6 featured posts right now and it's only showing 5 of them ... It does happen to be the 5 most recent of the 6. Clue?

I'm just wondering if it's FIXED as the top-5 featured posts or is there a setting somewhere I haven't found yet. Could it be something like top-5 featured in last 3-months for example? I'm excited and stumped at the same time. I like the effect and would even add a button to go to the /blog slug if I could figure out how it works.

FWIW ... I removed the "Featured Post" status on 1 of my 6 Featured Posts and for right now anyway it's working the way I like (it scrolls through banner photos of my 5 featured posts). This is a sad hack work around and presumes I'll never write another awesome (i.e., Featured) post. Still interested in hearing from any and all 7.0 Bedford blogging experts. Oh, and I even added an (imperfect FEATURED menu link that just links to /blog.