Cannot set Woocommerce product loop columns

When I add the Woocommerce [Products] shortcode, the products are always displayed in 4 narrow columns (the default), regardless of how I set the columns=”X” parameter.

Test page with the problem – linked below.
On this page I have added this shortcode:
[products limit=”2″ columns=”2″]

I would expect to see the two products take up all the available width, but they only take up half. If I set limit=”1″, one product is displayed, taking up only 1/4 of the screen.

I’ve tried adding the shortcode into a text block and code block, and also tried the [featured_products] shortcode, but I get the same result each time. I’ve also tried disabling the badge plugin but this didn’t help either.