CMS or Layout Issue

On my Desktop break point, I’m creating a Slider with a CMS collection with a Collection List Settings of 4 columns. (This works fine).

On my tablet break point, I’ve created a second list wrapper with a Collection List Setting Layout of 3 columns. The four Poster List Wrapper is hidden. (This also works fine)

When I get down to mobile landscape, I tried to create a Collection list Setting with a 2 column layout, but it will only show a single column.

So I’m not sure if I’m having a Collection List Setting Layout problem, or a CMS issue, or if there is just a better way to do this.

Any feedback or recommendations will be appreciated.

Here is my public share link: