Excellent, I'm glad to hear the new cart is working well, thanks for letting me know. No, you can discard the old cart (but save the chip in case you might need it in the future).
Yes, there is a redirect from our old to current websites if you type "inkjetmall.com". You can save a bookmark for the redirect address, or deal with a quick redirect when entering "inkjetmall.com". We are working on our new website, which will be very awesome and easy to navigate, and live SOON!
Best regards and happy printing~ Dana