yep but long ago and I changed my AW ID to escape, I was being pursued and almost outed. The result is AW will not recognise my phone number for notifications as they say it is registered to someone else.
HP, AFAIR, if you set up a NEW AW nic, but end up using your OLD punting number that was linked to your OLD AW nic, then your browser NEW AW nic will automatically be linked to your old AW nic as an alias.
I was given the follwing tips for setting up a new AW ID.
1 Clear all cookies out of a NEW Browser (e.g. Firefox)
2 Set up a new AW ID, with a NEW EMAIL Address, and if necessary, with a NEW punting mobile number
3 USe THIS browser only for the NEW ID.
IF you still wish to continue to use your OLD AW ID (linked to your old punting number), continue using the old Browser (e.g. Chrome).
NEVER, NEVER, NEVER at any point log into the other ID on the different browsers.
ALWAYS stick to NEW browser (or Browser 2) for the NEW ID, OLD Browser (Browser1) for the OLD ID.
You will also require 2 separate punting numbers. If this is not practical, then remove the old number form the OLD Profile, BUT stil get a new Number for the NEW Profile.
In short, the NEW ID must not be connected in any way to the old ID (in terms of Browser, email address and Phone number).
Phew!!