Hi,
It sounds like you may have logged in with the same eBay user ID for both token verifications.
This can happen especially easily if you let your internet browser save your login and password information.
Please contact me at
support@mycostpro.com with your download key (or paypal email address), and I will reset one of the tokens for you.
Once that is done, if you use auto-login when you go to ebay, instead open an internet browser in Private Mode, and then go to eBay, that way it will not have your login pre-filled, and you can log into the appropriate account.