the ip is not the problem as much here,its the cookies
you logging into different accounts without clearing cookies is a big issue you need to resolve
you mite aswell of rang them up and told which accounts are yours 
this is not good practice for stealth
i don't understand how you can think it was for any other reason,if you had of kept them all separate this would not of happened!!!
you linked your accounts through pure lazyness,end of story
the stealth guide clearly states to clear cookies or use a different user account for each stealth paypal
just bcoz it dont happen straight away doesn't mean it wont happen eventually
if you want have successful accounts you need to keep everything separate for a start
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