Customizr Pro and WooCommerce bookstore display

I am in the processing of upgrading a client’s website from Customizr (v.3.4.6) to Customizr Pro (1.2+), and after changing over (and always working within a child theme of Customizr), I am finding that the client’s bookstore in CPro is showing only one product at a time whereas the current site with the free version shows up as a grid. Please look at the live site:

https://www.maureentaylor.com/bookstore (this is how it should look)

and then https://www.maureentaylor.com/sandbox/bookstore (this isn’t the way it should look!)

I’ve done cache clearing and all manner of things you do when troubleshooting (viewing in different browser) and cannot see why it is behaving very differently between the two versions.

Thanks!