[SOLVED] Portfolio of Shortcode: can't set small device="2"

I Using Hortcode Ultimate and when I chose portfolio I would like to create a grid to see on my phone 2 different images on the same line but I can see just one big picture.
In the Short code ultimate option there is no the small device items button. So I can't choose how many items I can set.

I tried to put the code manually typing in the Joomla article code but doesn't work. Please see as attached.

I using this code:
[portfolio source="category: 17" show_more_action="auto" vertical_gap="50" thumb_resize="no" filter="no" show_zoom="no" small="2" medium="4"]
but doesn't work.

Any Ideas to le it be possible?
Thank you

No help?

Hello, you cant change the small.
Small is always one item because small has a size of 368px

Ok thank you. I will try another option.

Problem solved.