Shopping Cart icon error

I’ve just noticed that the small shopping cart icon in the header of my website is glitching – by listing all of the items in the cart instead of just showing the number of items in the cart as an icon, as it has always done. And when there is nothing in the cart, it says ‘no products in the cart’ with a big solid coloured square with $0.00 in place of where the shopping cart icon used to be (and should be).

When trying to fix the problem in the back end, it is appearing correct with just the shopping cart icon, so can’t figure out why the live site is appearing / functioning differently to the back end.

Any suggestions on why this is happening and how to fix it?

The page I need help with: [log in to see the link]