For anyone wondering I couldn't add the foam and the keyboard at the same time. If I picked the board and the foam the only thing in the cart was the foam, had to go back and actually add the keyboard again with no foam.
May i ask what you added (the specific options)? tested and i don't have this bug
I just ran into this and found that if you have multiple tabs open, this happens. For me, it was adding multiples of everything because I had added it to a cart in one tab and then in the other tab, I removed them but still must see some session data from other. I also saw the issue of just the foam added. So, to resolve this what I did was close all other tabs, refresh the cart, delete everything and then hit the Continue Browsing here link.