Shopify - Update "Featured Collection" section behaviour

Description

Hello
Our website: https://homearthaven.com uses the Dawn theme with multiple 'Featured Collection' sections being presented on the homepage.
There are 2 issues we wanted to get fixed when it comes to that section:
1. The homepage on desktops looks fine as long as we set the limit of 5 products to be displayed by each section.The moment we increase the number of products displayed, the layout of the section breaks (the right side is no longer the limit of the product tiles, they go beyond the page) and the product counter that starts appearing under the section is showing incorrect number of products - video 1.mp4 attached
2. On mobiles product count under the section is also wrong. Even though we set the number of products to be 15, the counter shows 14 - 2.mp4 attached.It would be great to be able to set different numbers of products to be displayed on desktops and mobiles (so another setting in theme editor for that particular section would be needed).
Since our Live theme is connected to github, we would like to kindly ask you to work on a Draft copy of the theme, and once the changes are there, we will do some testing and ask you to push the changes to the Live theme (as opposed to just publishing the draft theme).
Let us know whether you're able to help, how long would it take you to implement the fixes and when can you start working on it.
Kind regardsMartin