This has been raised several times - it seems AW doesn't use the IP address - which can change anyway - but browser cookies. So if you haven't cleared cookies on browsers on all the devices you use to contact AW, then chances are your new ID is already flagged as an alias to the old one. Only sure way is to start a completely new ID, after either clearing all cookies on all devices, or using a different browser which will be the only one you use to access the new account.