Items in Cart Not Showing on Mobile Devices

I am in the process of setting up Sell Media with one of the GPP responsive themes. All is going well, but getting down to the final details to get the site functioning.

I have added some items to purchase in Checkout. On my computer, they show up. When I login to my account on my ipad or phone, those items do not show in the cart. Can you explain why, and how I can fix that?

Also, I used a previous version of Sell Media, about a year ago. The images on the Collections pages were smaller, and were proportional. In other words, it was clear whether an image was horizontal or vertical. Now, the images are 300×300 square, with only 3 images per line. Is there a way to change that so the whole image shows, and I can fit maybe 6 images per line?

Thanks for your help!

https://www.ads-software.com/plugins/sell-media/