You can use a single E-junkie account for all your E-junkie activities; while you're logged into any account, you can click the Sellers, Affiliates, and Community tabs at the top of our site to pick which Admin panel you want to see at any moment for that account.
Once you decide which of your 3 accounts you want to use for all your E-junkie activities (this would probably be whichever account you've already added products to as a seller), you can simply abandon the other 2 accounts.