The categories in sj market II template is shown only the first product of every row!!!
So if you have 6 products per page and 3 products per row (like the demo below), in responsive design (smartphone) it is only shown the first product of the 2 rows (shown only 2 products).
demo.smartaddons.com/templates/joomla3/sj-market2/index.php/en/electronics

Dear lniniogr

Please add the css below at the end of this file eg templates/sj_market/css/presets/preset4.css

@media (max-width: 767px){
.category-view .row{
display: inline-block;
}
}
thanks