How did you use a different email than the one you applied with? They email the link to the assessments to the address you registered with? I'm not sure about taking them a second time, if I was you I would email them and say what happened ASAP, then phone them during working hours. It should just be a case of linking the tests you have already done to your application. A second round of testing may be seen as trying to do better the second time, which you inevitably would. It definitely said on the website that multiple applications would cancel each other out, though this is a slightly different situation. Get in touch with HR before you do anything.