Checkout page issues with Sparkling for Jigoshop

We are having two issues with the checkout pages at homeandaway.gallery; we use the Sparkling for Jigoshop theme, as noted in the subject line.

First, the page which shows the contents of the cart is not sized appropriately for a portrait view on an Android phone; it requires one to swipe to see the right side.

Second, the boxes for filling in name, address, etc. on the checkout page are annoyingly tiny – slightly wider than .5 cm. You can type in them, but only two letters at a time are visible. The billing and shipping sections are side by side, leaving very little space for these boxes. I have used other checkout pages on my phone that have appropriately sized boxes – around 2 cm for first name, 2 cm for last name, etc.

We have a few products set up on our site, so you can test this on a phone and see the results. The site is live, so please do not click all the way through; your credit card will be charged.

I am trying to figure out if this is an issue with the Sparkling for Jigoshop theme, or with Jigoshop, or something else. Does anyone know if there is a fix for this?

Thank you for your advice,
David

https://wordpress.org/plugins/jigoshop/