So I have just accessed this website from 3 different devices in 3 different browsers and on 3 different IPs, and entered a different addresses to "receive" my mixed coins to each time. On every single instance, it told me to send coins to the same address (14iFzgaa2HcYQ3PiZtsHUxrZzx2LGiWypX), and they would be mixed and sent back to the address I had entered.

If anyone else would like to verify they are also shown the address above, then it pretty much confirms that this is a scam. A scam so poorly set up they couldn't even be bothered to generate a new address for each victim.