Dawn - how can I show the item number on the pagination in featured-collection?

[harukajmickey]

Hi,

I am using Dawn theme. In featured-collection on the mobile, the pagination in the carrousel doesn't show the total item number shown in the carrousel. 

There are 12 items in the carrousel, but it shows 11. Attached is the video.

https://www.loom.com/share/20d24be87bdf497aabb7ba38628704b6?sid=e611f093-f1b0-4d5d-a7a1-2257f0878471

How can I show 12 instead of 11? In addition, how can I show 20 items only in the mobile?

The website is:

https://az7m59qbrkucpdko-62809473262.shopifypreview.com

Thank you in advance!