E-junkie Help >

I can only add one item in the cart.

Make sure you are testing your cart online (on a real domain, not localhost), your browser cookies are enabled and you are using ADD TO CART and VIEW CART buttons from the same E-junkie account. 

If any of the above applies to you, after making the required changed, clear you browser cache, clear your browser cookies, close your browser, start it again before testing the cart again.

This can also happen if you have different currencies for the products you are trying to add to the cart.