Hi hand-up-not-out,
Your eBay account is already associated with an existing Auctiva account with username "elcnj" so he easiest solution to this problem is to continue using this Auctiva account and to cancel your duplicate Auctiva account with username "auctivia".
If, for any reason, you would prefer to use your "auctivia" Auctiva account, please let me know and I will transfer your eBay token to that account.
-Mike