WooCommerce shortcode columns doesn't work

I have set it up to 2 columns on the home page and it’s showing 4
http://emma.abricot-production.com
Shortcode : [product_categories parent=”0″ columns=”2″]

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Also on the shop page, issue is – I can’t show 2 columns either. I added this to functions.php with no luck. Amending to 3 shows 3, anything else (1,2,5 etc…) shows 4

// Change number or products per row to 3
add_filter(‘loop_shop_columns’, ‘loop_columns’);
if (!function_exists(‘loop_columns’)) {
function loop_columns() {
return 3; // 4 products per row
}
}

Thank you for the help