Apologies if this has been asked before, I did do a search for it first.
My problem is that I seem to be able to only buy one game at a time with the new site. The "add to cart" and "add to wishlist" features seem to be disabled.
The result seems that I can only buy one game at a time, and have to go through the purchasing screen over and over for more than one purchase, instead of being able to buy a few games all at once.

How can I load my cart so that I only have to go through the payment process only once if I wanted to buy a few games at the same time?
I can't seem to find any other option than the "quick purchase" option, that seems to only allow for one game at a time?

Place the mouse cursor over the price of a game . A '+' will pop up. Mouse Over that '+' and you'll get the options to 'add to cart' or 'add to wishlist'.

Edit:

I forgot to mention that the way i described above is for when you're looking at the catalogue page, where all the games are listed.

If you're looking at a game card for a specifc game then those buttons are on the box on the left, the one with the 'download now' button.

Aren't any of those buttons working for you, catalogue page or game cards pages ?